“…Our research group has recently reported a strong association between OLP and the use of levothyroxine (LT 4 ; Robledo-Sierra, Landin- Wilhelmsen, Nystrom, Mattsson, & Jontell, 2015; Robledo-Sierra, Mattsson, & Jontell, 2013), which is a synthetic form of thyroxine used to treat thyroid hormone deficiency. Other studies have shown an increased use of thyroid medications among patients with OLP (Hirota, Moreno, dos Santos, Seo, & Migliari, 2011;Kragelund et al, 2003).…”