In the original article, there was a mistake in the legend for Figure 6 as published. Three numbers were not in superscript which changed concentrations and there was an error in dosage. The correct legend appears below. The authors apologize for this error and state that this does not change the scientific conclusions of the article in any way. The original article has been updated. Figure 6 | Our patient- and parent-friendly, multidisciplinary, centralized follow-up protocol. 1All follow-up appointments will be scheduled on the same day (Wednesday); 2Before 10:00 AM; 315 µg/kg/dose, max. 125 µg/dose; 410 µg/dL = 276 nmol/L, 18 µg/dL = 497 nmol/L; 510 mg/m2/day in three equal doses (3 times per day 33.3% of the total daily dose); when older than 6 months: 50% early in the morning, and 25% early in the afternoon and evening. Adrenal surveillance protocol adapted and modified from Regelmann et al. (2018). Abbreviations: ACTH, adrenocorticotropic hormone; K, potassium;Na, sodium; PRA, plasma renin activity; Q&A, questions & answers.