Sixty participants with at least one active MTP in uTM ( 28 women and 32 men ; mean age 24.51.44 years ) were recruited and randomly assigned to one out of five groups : active US ( n = 12 ) , placebo US ( n = 12 ) , active LLLT ( n = 11 ) , placebo LLLT ( n = 11 ) and no therapy ( control , n = 14 ) .