4Moore-Ede MC,Sulzman F M,Fuller C A.The Clocks That Time Us[M].Cambridge:Harvard University Press,1982.
5Refinetti R.Circadian Physiology[M].2nd.New York:Boca Raton,London,CRC Taylor & Francis:2006.
6Kalsbeek A,Palm IF,La Fleur SE,et al.SCN outputs and the hypothalamic balance of life[J].J Biol Rhythms,2006,21:458--469.
7Berguis M,Berggren U,Kiliaridis S.Experience of pain during an orthodontic procedure[J].Eur J Oral Sci,2002,110:92-98.
8Lee WC.Experimental study of the effect of prostaglandin administration on tooth movement-with particular emphasis on the relationship to the method of PGE1 administration[J].Am J Orthod Dentofacial Orthop,1990,98:231-241.
9Horst G,Wit CA.Review of behavioral research in dentistry 1987-1992:Dental anxiety,dentist-patient relationship,compliance and dental attendance[J].Int Dent,1993,43:265.
10Brian,Allen.The influence of a structured telephone call on orthodontic pain anxiety[J].Am J Orthod Dentofacial Orthop,2005,128:435-441.