Hepatite relacionada a drogas antituberculose: perfil de 149 pacientes internados no Hospital Universitario Joao de Barros Barreto no periodo de janeiro de 1984 a dezembro de 1990 / Hepatitis related at the antitubercular drugs: profile of inpatients in the Hospital University Joao de Barros Barreto in the period of january of 1984 at the december of 1990