Fig. 2From: Healthcare usage and cost for plantar fasciitis: a retrospective observational analysis of the 2010–2018 health insurance review and assessment service national patient sample dataQuarterly number of plantar fasciitis treatment cases QI: January, February, and March; QII: April, May, and June; QIII: July, August, and September; and QIV: October, November, and DecemberBack to article page