Public Health Reports
Public Health Reports > 2001 > 116 > 6 > 530-539
Public Health Reports > 2001 > 116 > 6 > 548-557
Public Health Reports > 2002 > 117 > 1 > 28-36
Public Health Reports > 2002 > 117 > 1 > 20-27
Public Health Reports > 2002 > 117 > 1 > 8-19