Schedule of assays.

aMice were weaned and entered into the experimental protocol at 3 weeks of age, except B6 mice, which were weaned and entered at 4 weeks of age, their normal wean age; hence, B6 were 1 week older at the time of each measurement.除B6品系小鼠外，其余受试小鼠均于3周龄时断奶并纳入实验流程；B6小鼠的正常断奶周龄为4周，因此其在每次检测时均较其他小鼠年长1周。