[lemma="59"] [lemma="%"] [□] □
[lemma="59"] [lemma="%"] [!□] □
[lemma="59"] [lemma="%"] [□ & □] □
22 of 37 ( 59 % ) treated patients had lost hepatitis B surface antigen when tested 15-20 days after the end of the treatment compared with only 1 of 23 ( 4 % ) placebo-treated controls .