Silva R J
Child Welfare. 1980 Jul-Aug;59(7):387-400.
Examination of findings in three epidemiological studies indicates that higher standards of care can reduce the incidence of hepatitis among parents and staff.
三项流行病学研究的结果调查表明,更高的护理标准可以降低家长和工作人员中肝炎的发病率。