author=  "A. Vollebregt and A. ten Teije and F. van Harmelen and J. van der Lei and M. Mosseveld",
 title =   "A study of PROforma, a development methodology for clinical procedures ",
 journal =  "AI in Medicine,
 year =  "1999",
 note =  "To appear",
volume =  "",
number =   "",
pages =  "xxx"}