| Diego blood group | 
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| Diff | 
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| Digital rectal examination (DRE) | 
| Digital subtraction angiography (DSA) | 
| Diluted whole blood clot lysis | 
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| Diphtheria | 
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| Direct Coombs' test | 
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| Disclosure guidelines | 
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| Disseminated intravascular coagulation (DIC) tests | 
| DL | 
| Dlco | 
| DNA, circulating cell-free |