TY - GEN AU - LILIENFELD,A M TI - On the methodology of investigations of etiologic factors in chronic diseases: some comments SN - 0021-9681 PY - 2000///0701 KW - Chronic Disease KW - etiology KW - Humans N1 - Publication Type: Journal Article UR - https://doi.org/10.1016/0021-9681(59)90016-5 ER -