TY - RPRT TI - Methodologic problems of exercise testing for coronary artery disease: groups, analysis and bias. AU - J T Philbrick AU - R I Horwitz AU - A R Feinstein PY - 1980 DO - 10.1016/0002-9149(80)90432-4 UR - https://pubmed.ncbi.nlm.nih.gov/7435391/ ID - 7435391 ER -