| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Urea measurement | Component | True | Urea (substance) | Inferred relationship | Some | 1 | 
| Uremic stomatitis | Causative agent | False | Urea (substance) | Inferred relationship | Some | 2 | 
| Product containing urea (medicinal product) | Has active ingredient | True | Urea (substance) | Inferred relationship | Some | 1 | 
| Blood urea measurement | Component | False | Urea (substance) | Inferred relationship | Some | 2 | 
| Urea clearance measurement (procedure) | Component | True | Urea (substance) | Inferred relationship | Some | 1 | 
| Fluid sample urea measurement | Component | False | Urea (substance) | Inferred relationship | Some | 2 | 
| Urine urea measurement | Component | False | Urea (substance) | Inferred relationship | Some | 2 | 
| Serum urea measurement | Component | False | Urea (substance) | Inferred relationship | Some | 2 | 
| Plasma urea measurement | Component | False | Urea (substance) | Inferred relationship | Some | 2 | 
| 24 hour urine urea output measurement | Component | False | Urea (substance) | Inferred relationship | Some | 2 | 
| Urea creams and lotions | Has active ingredient | False | Urea (substance) | Inferred relationship | Some |  | 
| Urea 100 mg/g cutaneous cream | Has active ingredient | False | Urea (substance) | Inferred relationship | Some |  | 
| Product containing precisely lauromacrogol 30 milligram/1 gram and urea 50 milligram/1 gram conventional release cutaneous cream (clinical drug) | Has active ingredient | False | Urea (substance) | Inferred relationship | Some |  | 
| Product containing precisely urea 100 milligram/1 gram conventional release cutaneous lotion (clinical drug) | Has active ingredient | False | Urea (substance) | Inferred relationship | Some |  | 
| Lactic acid 50 mg/g and urea 100 mg/g cutaneous cream | Has active ingredient | False | Urea (substance) | Inferred relationship | Some |  | 
| Product containing precisely urea 400 milligram/1 milliliter conventional release cutaneous cream (clinical drug) | Has active ingredient | False | Urea (substance) | Inferred relationship | Some |  | 
| Urea 400 mg/mL cutaneous lotion | Has active ingredient | False | Urea (substance) | Inferred relationship | Some |  | 
| Urea 40% | Has active ingredient | False | Urea (substance) | Inferred relationship | Some |  | 
| Urea 40g | Has active ingredient | False | Urea (substance) | Inferred relationship | Some |  | 
| Carbon (13-C) urea | Is a | False | Urea (substance) | Inferred relationship | Some |  | 
| Carbon (14-C) urea | Is a | False | Urea (substance) | Inferred relationship | Some |  | 
| Product containing urea in topical dosage form | Has active ingredient | False | Urea (substance) | Inferred relationship | Some |  | 
| Urea poisoning | Causative agent | True | Urea (substance) | Inferred relationship | Some | 1 | 
| Urea-hydrogen peroxide complex 5% ear drops | Has active ingredient | False | Urea (substance) | Inferred relationship | Some |  | 
| Urea herbicide | Is a | False | Urea (substance) | Inferred relationship | Some |  | 
| Urea nitrogen | Is a | False | Urea (substance) | Inferred relationship | Some |  | 
| Urea topical agent | Is a | False | Urea (substance) | Inferred relationship | Some |  | 
| Calcium challenge tests | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Chloride measurement, blood | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Chloride measurement, body fluid | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Phosphate measurement | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Calcium/creatinine ratio measurement | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Potassium/sodium ratio measurement | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Urea and electrolytes | Component | False | Urea (substance) | Inferred relationship | Some | 3 | 
| Measurement of fractional excretion of potassium (procedure) | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Calcium measurement in 24 hour excretion in faeces | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Chloride measurement, urine | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Electrolytes measurement, urine | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Electrolytes measurement, plasma | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Electrolytes measurement, serum | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Calcium excretion, 2-hour collection, fasting, urine | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Chloride measurement | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Potassium measurement, urine (procedure) | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Potassium measurement | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Calcium measurement | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Calcium measurement, urine | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Electrolytes measurement | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Cystic fibrosis sweat test | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Corrected serum calcium measurement (procedure) | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| CSF chloride measurement | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Fluid sample potassium measurement | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Serum potassium measurement | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Serum chloride measurement (procedure) | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Serum calcium measurement | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Blood potassium measurement | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Blood calcium measurement | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Blood electrolyte measurement | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| 24 hour urine calcium output measurement | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| 24 hour urine potassium output measurement | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Sweat potassium measurement | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Calculus phosphate content measurement | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Serum electrolytes NOS | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Urine electrolytes NOS | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Cerebrospinal fluid: chloride level NOS | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Product containing papain and urea (medicinal product) | Has active ingredient | True | Urea (substance) | Inferred relationship | Some | 1 | 
| 24 hour urine chloride output (procedure) | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Fluid sample phosphate measurement (procedure) | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Dialysis fluid urea measurement (procedure) | Component | False | Urea (substance) | Inferred relationship | Some | 2 | 
| Cerebrospinal fluid potassium measurement (procedure) | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Cerebrospinal fluid urea measurement (procedure) | Component | False | Urea (substance) | Inferred relationship | Some | 2 | 
| Urine calcium / creatinine ratio measurement (procedure) | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Dialysis fluid potassium measurement (procedure) | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Plasma calcium level (procedure) | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Plasma potassium level (procedure) | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Plasma corrected calcium level (procedure) | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Serum ionised calcium measurement | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Serum ionized calcium (pH 7.4) level (procedure) | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Plasma electrolyte measurement (procedure) | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Plasma chloride measurement (procedure) | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Plasma inorganic phosphate measurement (procedure) | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| 24 hour urine electrolytes measurement (procedure) | Component | False | Urea (substance) | Inferred relationship | Some |  | 
| Hydrocortisone 10 mg/g and urea 100 mg/g cutaneous cream | Has active ingredient | False | Urea (substance) | Inferred relationship | Some |  | 
| Product containing hydrocortisone and urea (medicinal product) | Has active ingredient | True | Urea (substance) | Inferred relationship | Some | 1 | 
| Product containing lactic acid and urea (medicinal product) | Has active ingredient | True | Urea (substance) | Inferred relationship | Some | 1 | 
| Product containing lauromacrogol and urea (medicinal product) | Has active ingredient | True | Urea (substance) | Inferred relationship | Some | 1 | 
| Product containing urea in parenteral dose form (medicinal product form) | Has active ingredient | True | Urea (substance) | Inferred relationship | Some | 1 | 
| Urea 40-50% injection solution vial | Has active ingredient | False | Urea (substance) | Inferred relationship | Some |  | 
| Product containing urea in otic dosage form | Has active ingredient | False | Urea (substance) | Inferred relationship | Some |  | 
| Urea 40g powder for injection solution 200mL bottle | Has active ingredient | False | Urea (substance) | Inferred relationship | Some |  | 
| Urea-containing product in oral dose form | Has active ingredient | True | Urea (substance) | Inferred relationship | Some | 1 | 
| Measurement of urea, sodium, potassium, chloride, bicarbonate and creatinine (procedure) | Component | False | Urea (substance) | Inferred relationship | Some | 2 | 
| Measurement of urea, sodium, potassium, chloride, bicarbonate and glucose (procedure) | Component | True | Urea (substance) | Inferred relationship | Some | 1 | 
| Carbon (14-C) urea | Is modification of (attribute) | True | Urea (substance) | Inferred relationship | Some |  | 
| Allergy to urea (finding) | Causative agent | True | Urea (substance) | Inferred relationship | Some | 1 | 
| Carbon (13-C) urea | Is modification of (attribute) | True | Urea (substance) | Inferred relationship | Some |  | 
| Urea 100 mg/g cutaneous cream | Has precise active ingredient | True | Urea (substance) | Inferred relationship | Some | 1 | 
| Urea 100 mg/g cutaneous cream | Has basis of strength substance (attribute) | True | Urea (substance) | Inferred relationship | Some | 1 | 
| Product containing precisely urea 100 milligram/1 gram conventional release cutaneous lotion (clinical drug) | Has basis of strength substance (attribute) | True | Urea (substance) | Inferred relationship | Some | 1 | 
| Product containing precisely urea 100 milligram/1 gram conventional release cutaneous lotion (clinical drug) | Has precise active ingredient | True | Urea (substance) | Inferred relationship | Some | 1 | 
| Hydrocortisone 10 mg/g and urea 100 mg/g cutaneous cream | Has precise active ingredient | False | Urea (substance) | Inferred relationship | Some | 2 | 
| Hydrocortisone 10 mg/g and urea 100 mg/g cutaneous cream | Has basis of strength substance (attribute) | False | Urea (substance) | Inferred relationship | Some | 2 |