TY - JOUR KW - Adult KW - Age Factors KW - Child KW - China KW - Female KW - Humans KW - India KW - Japan KW - leprosy KW - Male KW - Middle Aged KW - Nigeria KW - Norway KW - Population Surveillance KW - Risk KW - Time Factors KW - United States KW - Venezuela AU - Irgens L M BT - International journal of leprosy and other mycobacterial diseases : official organ of the International Leprosy Association C1 - http://www.ncbi.nlm.nih.gov/pubmed/4086921?dopt=Abstract CN - IRGENS1985 DA - 1985 Dec IS - 4 J2 - Int. J. Lepr. Other Mycobact. Dis. LA - eng PY - 1985 SP - 610 EP - 7 T2 - International journal of leprosy and other mycobacterial diseases : official organ of the International Leprosy Association TI - Secular trends in leprosy: increase in age at onset associated with declining rates and long incubation periods. VL - 53 SN - 0148-916X ER -