METHODS	Ninety patients were randomly assigned to three treatment groups by one of the nontreating authors by drawing 1 of 90 envelopes labeled ` A ' ( Group I : actual LPLT consisted of 5 minutes , 3 J total dose + exercise ; 30 patients ) , ` B ' ( Group II : actual LPLT consisted of 3 minutes , 2 J total dose + exercise ; 30 patients ) , and ` C ' ( Group III : placebo laser group + exercise ; 30 patients ) .\