Volunteers must fill out an extensive questionnaire, give blood and urine samples and provide their name, address, sex, National Health Service number, date of birth and general practitioner.

• 志愿者必须填写一份详细的调查表，捐献血样和尿样，并提供自己的名字、住址、性别、国民健康服务号码、出生日期和常用医生的信息。