Sorry for this as it is no doubt a misuse of Allstat. I am trying to contact Ben Crowe. Hopefully Ben you are still on Allstat- give me an email please. Happy Christmas to everyone else. Best wishes Philip ___________________________________________________________________ Dr Philip Sedgwick Senior Lecturer in Medical Statistics, Room 6.19, Level 6, Hunter Wing, Department of Community Health Sciences, St. George's Hospital Medical School, London SW17 ORE. Email: [log in to unmask] <mailto:[log in to unmask]> Telephone: + 44 20 8725 5551 Fax: + 44 20 8725 3584 Webpage: http://www.sghms.ac.uk/depts/phs/staff/ps/ps.htm [Last updated 15th July 2004] -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.