Acupuncture was administered in outpatient clinics by 46 ( mean age 4710years ; 24 female / 22 male ) conventionally-trained medical doctors ( 67 % with postgraduate specialization such as internal or family medicine ) with additional extensive acupuncture training ( median 500hours ( 1st quartile 350 , 3rd quartile 1000hours with 73 % presenting a B-diploma in acupuncture training ( 350hours ) ) and experience ( mean 14years in practice ) .