Table 1 Search strategy for Harpagophytum procumbens DC. ex Meisn. by MEDLINE (Via Ovid)

o #1 exp Osteoarthritis/or Osteoarthrits.mp. (57958)

o #2 Osteoarthritides.mp. or exp Osteoarthritis/(44712)

o #3 Osteoarthrosis.mp. or exp Osteoarthritis/(45663)

o #4 Osteoarthroses.mp. or exp Osteoarthritis/(44719)

o #5 Arthritis, Degenerative.mp. or exp Osteoarthritis/(44737)

o #6 Arthritides, Degenerative.mp. or exp Osteoarthritis/(44711)

o #7 Degenerative Arthritides.mp. or Osteoarthritis/(44718)

o #8 Degenerative Arthritis.mp. or exp Osteoarthritis/(45350)

o #9 Osteoarthrosis Deformans.mp. or exp Osteoarthritis/(44727

o #10 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 (59473)

o #11 Harpagophytum.mp. or exp Harpagophytum/(149)

o #12 Harpagophytums.mp. or exp Harpagophytum/(83)

o #13 Harpagophytum procumbens.mp. or exp Harpagophytum/(135)

o #14 Harpagophytum procumben.mp. or exp Harpagophytum/(82)

o #15 procumben, Harpagophytum.mp. or exp Harpagophytum/(82)

o #16 procumbens, Harpagophytum.mp. or exp Harpagophytum/(82)

o #17 Devils Claw.mp. or exp Harpagophytum/(116)

o #18 Claw, Devils.mp. or exp Harpagophytum/(83)

o #19 Claws, Devils.mp. or exp Harpagophytum/(82)

o #20 Devils Claws.mp. or exp Harpagophytum/(82)

o #21 Exp Harpagophytum/(82)

o #22 Exp Harpagophytum/(82)

o #23 Harpagophytum/(82)

o #24 11 or 12 or 13 or 14 or 15 or 16 or 17 or 18 or 19 or 20 or 21 or 22 or 23 (164)

o #25 10 and 24 (37)