TY  - GEN
AU  - Makuch,R W
AU  - Simon,R M
TI  - Sample size considerations for non-randomized comparative studies
SN  - 0021-9681
PY  - 1980///0417
KW  - Evaluation Studies as Topic
KW  - Humans
KW  - Sampling Studies
N1  - Publication Type: Comparative Study; Journal Article
UR  - https://doi.org/10.1016/0021-9681(80)90017-x
ER  -