The European Prospective Investigation into Cancer study tracked their levels of drinking and how this affected their risk of cancer.
对癌症的欧洲前瞻性调查追踪了居民的饮酒水平和饮酒如何影响癌症的发病风险。
2
Epidemiological investigation identified a possible risk factor as exposure to wild bird faeces found around the house.
流行病学调查发现，接触其住房周围野禽的粪便可能是一个风险因素。
3
Thorough investigation of all such clusters is essential to determine possible changes in the behaviour of the virus and thus support assessment of the risk of an influenza pandemic.