2Maclure M.Tom Chalmers 1917-1995,Part 2:The tribulations of a trialist.Can Med Assoc J,1996,155:986-988.
3Cook TD,Campbell DT.Quasi-experimentation:design and analysis issues for field settings.Boston,MA:Houghton Mifflin Company.1979.
4Brown CA,Lilford RJ.The stepped wedge trial design:a systematic review.BMC Med Res Methodol,2006,6:54-62.
5The Gambia Hepatitis Study Group.The Gambia hepatitis intervention study.Cancer Res,1987,47:5782-5787.
6Hussey MA,Hughes JP.Design and analysis of stepped wedge cluster randomized trials.Contemporary Clinical Trials,2007,28:182-191.
7Wilmink TBM,Quick CRG,Hubbard CF,et al.The influence of screening on the incidence of ruptured abdominal aortic aneurysms.J Vase Surg,1999,30:203-208.
8Levy RW,Rayner CR,Fairley CK,et al.Multidisciiplinary HIV adherence intervention:a randomized study.AIDS Patient Care STDs,2004,18:728-735.
9Grant AD,Charalambous S,Fielding KL,et al.Effect of routine isoniazid preventative therapy on tuberculosis incidence among HIV-infected men in South Africa.JAMA,2005,22:2719-2725.
10Moulton LH,Golub JE,Durovni B,et al.Statistical design of THRio:a phased implementation clinic-randomized study of a tuberculosis preventive therapy intervention.Clin Trials,2007,4:190-199.