3Beretta R. A critical review of the Delphi technique[ J]. Nuts Res, 1996, 3(4) : 79 -89.
4Hasson F, Keeney S, Mckenny H. Research guidelines for the Delphi survey technique [J]. J Adv Nurs, 2001, 32(4): 1008- 1015.
5Powell C. The Delphi technique: Myths and realities[J]. J Adv Nurs, 2003, 41(4) : 376 -382.
6Edmunds S, Haines L, Blair M. Development of a questionnaire to collect public health data for school entrants in London : child health assessment at school entry (CHASE) project[J]. Child Care Health Dev, 2005, 31(1): 89-97.