. HastingsMKMuellerMJSinacoreDR: Botulinum toxin effects on gastrocnemius strength and plantar pressure in diabetics with peripheral neuropathy and forefoot ulceration. Foot Ankle Int.33(5): 363–370, 2012.
2.
. FreedmanKBBernsteinJ: Sample size and statistical power in clinical orthopaedic research. J Bone Joint Surg Am.81(10): 1454–1460, 1999.
3.
. ZlowodzkiMBhandariM: Outcome measures and implications for sample-size calculations. J Bone Joint Surg Am.91(suppl 3): 35–40, 2009.
