... antidepressants - a meta-analysis. JAMA 2009, 301:198-209.82. Häuser W, Bernardy K, Üceyler N, Sommer C: Treatment of fibromyalgia syndrome with gabapentin and pregabalin - a meta-analysis of randomized ... Zijlstra TR, Laar MA van de, Bernelot HJ Moens, Taal E, Zakraoui L, Rasker JJ: Spa treatment for primary fibromyalgia syndrome: a combination of thalassotherapy, exercise and patient education ... estimates against its stan-dard error) calculated by RevMan Analyses software.Publication bias may lead to asymmetrical funnel plots[15]. Moreover, we checked a potential small sample size bias...