title: Authors' reply.
authors.affiliation: Medical Toxicology Research Center, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran. BalalimoodM@mums.ac.ir.
authors.forename: M
authors.initials: M
authors.lastname: Balali-Mood
authors.affiliation: Medical Toxicology Research Center, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: M
authors.initials: M
authors.lastname: Vahabzadeh
keywords: Chronic mercury exposure; Gilding; Mercury hygiene; Mercury poisoning; Mercury, elemental