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What is Zelen's design?
Torgerson DJ, Roland M. Torgerson DJ, et al. BMJ. 1998 Feb 21;316(7131):606. doi: 10.1136/bmj.316.7131.606. BMJ. 1998. PMID: 9518917 Free PMC article. Review. No abstract available.
Randomisation methods in controlled trials.
Roberts C, Torgerson D. Roberts C, et al. BMJ. 1998 Nov 7;317(7168):1301. doi: 10.1136/bmj.317.7168.1301. BMJ. 1998. PMID: 9804722 Free PMC article. Review. No abstract available.
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