Table 1.

RCT search strategy

#1 randomized controlled trial. pt

#2 limit #1 to (clinical trial, phase i or clinical trial, phase ii)

#3 #1 not #2

#4 limit #3 to yr = 2003

#5 limit #4 to human

#6 limit #5 to journal article

#7 comment. pt

#8 #6 not #7

#9 #8 not letter. pt