Table 1.

Quality of the Studies Reviewed.

Name of the Study	Randomization	Similar Groups Initially?	Equal Treatments?	All Participants Accounted for?	Analyzed in Groups to Which They Were Randomized?	Objective/“Blind” Treatments?
Liptzin et al 28	Yes	Yes	Yes	Yes	Yes	Yes
Sampson et al 29	Yes	Yes	Yes	Yes	Yes	Yes
Gamberini et al 30	Yes	Yes	Yes	Yes	Yes	Yes
Overshott et al 31	Yes	Yes	Yes	Yes	Yes	Yes
van Eijk et al 32	Yes	Yes	Yes	Yes	Yes	Yes
Marcantonio et al 33	Yes	Yes	Yes	Yes	Yes	Yes
Zaslavsky et al 34	Yes	Unclear	Unclear	Yes	Unclear	Yes