Controlled Clinical Trials
Controlled Clinical Trials > 1997 > 18 > 4 > 301-305
Controlled Clinical Trials > 1997 > 18 > 4 > 277-285
Controlled Clinical Trials > 1997 > 18 > 4 > 306-310
Controlled Clinical Trials > 1997 > 18 > 4 > 311-317
Controlled Clinical Trials > 1997 > 18 > 4 > 286-300