AU  - Raymond C
TI  - NAgging doubt, public opinion offer obstacles to ending `cluster' studies
PT  - JOUR
DP  - 1989
TA  - JAMA
pages = {2297-2298},
VI  - 261
IP  - 16
AID  - 10.1001/jama.1989.03420160013002 [doi]
4100  - http://dx.doi.org/10.1001/jama.1989.03420160013002
SO  - JAMA April 28, 1989 261(16):2297