S29	S20 and S28	69
S28	S27 or S26 or S25 or S24 or S23 or S22 or S21	67,184
S27	TX placebo*	5564
S26	TX ((allocat* or allot* or assign* or divid*) and (condition* or experiment* or intervention* or treatment* or therap* or control* or group*))	13,015
S25	TX randomi?ed control* trial*	2808
S24	TX (cross?over or (cross over))	616
S23	TX ((singl* or doubl* or trebl* or tripl*) and (blind* or mask*))	3926
S22	TX (random* and (allocat* or allot* or assign* or basis* or divid* or order*))	7890
S21	TX ((clinic$ or controlled or comparative or placebo or prospective or randomised or randomized) and (trial or study))	55,162
S20	S14 and S19	304
S19	S15 or S16 or S17 or S18	34,554
S18	TI ( (ergonom* or biomechanic*) ) or AB ( (ergonom* or biomechanic*) )	10,872
S17	DE "POSTURE" OR DE "SITTING position" OR DE "STANDING position"	6605
S16	DE "BIOMECHANICS"	24,293
S15	DE "HUMAN engineering" OR DE "SITUATIONAL awareness"	584
S14	S9 and S13	1871
S13	S10 or S11 or S12	128,203
S12	TI carpal tunnel syndrome* or AB carpal tunnel syndrome*	367
S11	TI ( ( (neck* or shoulder* or arm* or upper limb* or upper extremit* or elbow* or forearm* or wrist* or hand* or finger*) ) ) or AB ( ( (neck* or shoulder* or arm* or upper limb* or upper extremit* or elbow* or forearm* or wrist* or hand* or finger*) ) )	83,022
S10	DE "NECK pain" or DE "SHOULDER pain" or DE "WOUNDS & injuries"	53,783
S9	S1 or S2 or S3 or S4 or S5 or S6 or S7 or S8	4530
S8	TI ( (vibration and (induced or related or syndrome*)) ) or AB ( (vibration and (induced or related or syndrome*)) )	196
S7	TI ( (repetit* and (strain or stress or industr* or motion or movement or trauma)) ) or AB ( (repetit* and (strain or stress or industr* or motion or movement or trauma)) )	1520
S6	TI work related* or AB work related*	871
S5	TI cumulative trauma* or AB cumulative trauma*	49
S4	TI ( ("occupational overuse" or "tension neck") and syndrome* ) or AB ( ("occupational overuse" or "tension neck") and syndrome* )	1
S3	DE "OCCUPATIONAL health services"	470
S2	DE "OCCUPATIONAL diseases"	355
S1	DE "OVERUSE injuries"	1408