TY  - GEN
AU  - Knottnerus,J A
TI  - Subject selection in hospital-based case-control studies
SN  - 0021-9681
PY  - 1987///0330
KW  - Hospitalization
KW  - Humans
KW  - Outcome and Process Assessment, Health Care
KW  - Referral and Consultation
KW  - Sampling Studies
N1  - Publication Type: Letter
UR  - https://doi.org/10.1016/0021-9681(87)90071-3
ER  -