Associations of sleep duration and prediabetes prevalence in a middle‐aged and elderly Chinese population with regard to age and hypertension: The China Health and Retirement Longitudinal Study baseline survey: 在中老年中国人群中研究老龄化和高血压对睡眠时长与糖尿病前期患病率之间关系:中国健康与养老追踪基线调查. Issue 11 (26th April 2018)