TY - JOUR AU - Thompson, S G TI - Systematic Review: Why sources of heterogeneity in meta-analysis should be investigated JF - British Medical Journal (Clinical Research Edition) DO - 10.1136/bmj.309.6965.1351 DA - 1994-11-19 UR - https://www.deepdyve.com/lp/unpaywall/systematic-review-why-sources-of-heterogeneity-in-meta-analysis-should-lwLRh3RJ1r DP - DeepDyve ER -