Methods: The fingerprint patterns of 60 twins were examined by means of genetic epidemiologicmethods.
方法：利用遗传流行病学方法研究济宁市区60对双生子的指纹纹型。
2
Methods Using the epidemiologicmethods of intervention, to compare the effect of Se supplement, Vit C supplement and cereals dryness on KBD's treatment.
方法用干预实验的流行病学方法，分别对补硒、补维生素C、主食粮食干燥治疗大骨节病的效果进行对比研究。
3
CSF and blood were tested by standard bacteriologic technique. CSF, blood and concentrated urine were tested directly for detecting antigen by CIE. The data were analysed by epidemiologicmethods.