RT Journal
T1 MAy 26, 1999
JF JAMA
JO JAMA
YR 1999
FD May 26
VO 281
IS 20
SP 1959
OP 1960
DO 10.1001/jama.281.20.1959
UL http://dx.doi.org/10.1001/jama.281.20.1959
AB