| MHR | major histocompatibility region; malignant hyperthermia resistance; maternal heart rate; maximal hea... |
|---|---|
| MMFR | maximum midexpiratory flow rate; maximal midflow rate |
| MPR | mannose 6-phosphate receptor; marrow production rate; massive preretinal retraction; maximum pulse r... |
| MRR | marrow release rate; maximum relation rate |
| PCR | patient contact record; phosphocreatinine; plasma clearance rate; polymerase chain reaction; post-co... |