EMBASE 1980 to 2007 Week 12

1 exp arthritis, rheumatoid/ (55465) 2 (arthritis adj2 rheumat$).tw. (41958) 3 (felty$ adj2 syndrome).tw. (375) 4 (caplan$ adj2 syndrome).tw. (34) 5 rheumatoid nodule.tw. (146) 6 (sjogren$ adj2 syndrome).tw. (6148) 7 still$ disease.tw. (805) 8 (spondylitis adj2 ankylosing).tw. (4720) 9 or/1‐8 (70216) 10 abatacept.tw. (67) 11 exp abatacept/ (340) 12 orencia.tw. (38) 13 ctla4Ig.tw. (316) 14 CTLA‐4IG.tw. (69) 15 CTLA4‐Ig.tw. (243) 16 CTLA‐4‐Ig.tw. (85) 17 or/10‐16 (986) 18 random$.ti,ab. (330681) 19 factorial$.ti,ab. (6740) 20 (crossover$ or cross over$ or cross‐over$).ti,ab. (35382) 21 placebo$.ti,ab. (97190) 22 (doubl$ adj blind$).ti,ab. (76436) 23 (singl$ adj blind$).ti,ab. (6561) 24 assign$.ti,ab. (92926) 25 allocat$.ti,ab. (29201) 26 volunteer$.ti,ab. (88947) 27 crossover procedure.sh. (18389) 28 double blind procedure.sh. (63195) 29 randomized controlled trial.sh. (115217) 30 single blind procedure.sh. (6449) 31 or/18‐30 (564943) 32 exp animal/ or nonhuman/ or exp animal experiment/ (3097329) 33 exp human/ (5675468) 34 32 and 33 (441828) 35 32 not 34 (2655501) 36 31 or 35 (3148641) 37 9 and 17 and 36 (34)