RESULTS	After 3 months , Er : YAG AFL-PDT was significantly more effective ( 93.8 % ) than MAL-PDT ( 73.1 % ; P = 0.031 ) , and the recurrence rate was significantly lower for Er : YAG AFL-PDT ( 6.7 % ) than MAL-PDT ( 31.6 % ) at 12 months ( P = 0.022 ) .\