TY - RPRT TI - The Coronary Drug Project. External quality control programs. AU - P L Canner AU - W F Krol AU - S A Forman PY - 1983 DO - 10.1016/0197-2456(83)90028-4 UR - https://pubmed.ncbi.nlm.nih.gov/6675895/ ID - 6675895 ER -