NAXE and Mitochondrial myopathy: There were similar findings for vitamin B3 (niacin or nicotinamide riboside), which was preferred by some respondents for patients with mitochondrial myopathy, NAD(P)HX dehydratase (NAXD) and NAD(P)HX epimerase (NAXE) deficiency (not specifically included in the survey but mentioned by some respondents in free‐text comments).