Table 1.

Search strategy in PubMed.

Number	Search items
#1	“Myasthenia Gravis”[Mesh] OR (Myasthenia Gravis, Ocular) OR. (Ocular Myasthenia Gravis) OR (Myasthenia Gravis, Generalized) OR (Generalized Myasthenia Gravis) OR (Early-onset Myasthenia Gravis) OR (Late-onset Myasthenia Gravis)
#2	“ azathioprine” [ti, ab] OR “ mycophenolate mofetil “ [ti, ab] OR “ methotrexate “ [ti, ab] OR “ cyclophosphamide “ [ti, ab] OR “ tacrolimus “ [ti, ab]
#3*	randomized controlled trial [pt] OR controlled clinical trial[pt] OR randomized [tiab] OR. placebo [tiab] OR clinical trials as topic [mesh:noexp] OR randomly[tiab] OR trial [ti]
#4	#1 AND #2 AND #3
#5	NOT (“animals”[mesh] NOT “humans”[mesh])
#6	#4 AND #5

^* Direct link to PubMed with sensitivity- and precision-maximizing version (2008 revision). Lefebvre C, Manheimer E, Glanville J. Chapter 6: Searching for studies. In: Higgins J, Green S (eds). Cochrane Handbook for Systematic Reviews of Interventions. Version 5.1.0 (updated March 2011). The Cochrane Collaboration, 2011. Available from: www.cochrane-handbook.org.