Hello Philip, I have a book somewhere ??? by Prof. Glasziou on systematic reviews. I did a book review on this for the Aust and New Z J of Public Health years ago. I have not looked at it, except once in the last few years and now it is not where I thought I put it. I will look for it over the next few days, sorry I cannot be of more help. Michael Borenstein [spelling ?] has a book on meta-analysis. All the best with this question. Cheers, Deborah Hilton Statistics Online
Hello Philip, actually he's published this which you can find on pubmed. That should help. The email for him is incorrect now but he is on research gate also.
Good Luck, Debbi e
Stat Med. 2002 Jun 15;21(11):1503-11.
Investigating causes of heterogeneity in systematic reviews.
Glasziou PP, Sanders SL.
Source
Centre for Evidence Based Health Care, University of Queensland, Brisbane, Australia. [email protected]