DATABASE (ACCESS) and date of search	Search strategy and hits retrieved
MEDLINE (PubMed) 1 June 2014	#1 fibromyalgia[mh] #2 fibromyalgi*[tiab] #3 fibrositis[tiab] #4 #1 OR #2 OR #3 8153 #5 randomized controlled trial[pt] #6 controlled clinical trial[pt] #7 randomized[tiab] #8 randomised[tiab] #9 randomly[tiab] #10 randomization[tiab] #11 randomisation[tiab] #12 random allocation[mh] #13 double‐blind method[mh] #14 “double blind”[tiab] #15 “double masked”[tiab] #16 placebo[mh] #17 placebo[tiab] #18 drug therapy[sh] #19 trial[tiab] #20 groups[tiab] #21 OR/5‐20 3344304 #22 animals[mh] NOT (animals[mh] AND humans[mh]) #23 #21 NOT #22 2869063 #24 #4 AND #23 2750
EMBASE (Accessed via Elsevier) 1 June 2014	#1 ‘fibromyalgia’/exp #2 fibromyalgi*: ab,ti #3 fibrositis:ab,ti #4 #1 OR #2 OR #3 14,348 #5 ‘controlled clinical trial’:de #6 ‘randomized controlled trial’:de #7 randomized:ab,ti #8 randomised:ab,ti #9 randomization:ab,ti #10 randomisation:ab,ti #11 randomly:ab,ti #12 randomization:de #13 placebo:de #14 placebo:ab,ti #15 ‘double blind procedure’:de #16 double AND blind:ti,ab #17 double masked:ti,ab #18 trial:ti,ab #19 OR/5‐18 1,345,881 #20 #4 AND #19 2,594
CENTRAL Cochrane Central Register of Controlled Trials Issue 5 of 12, May 2014	#1MeSH descriptor Fibromyalgia, explode all trees 518 #2 fibromyalgi*:ti,ab,kw 933 #3 fibrositis:ti,ab,kw 58 #4 #1 OR #2 OR #3 970