Carta abierta a Antonio Barrera Arenales.

The open letter is addressed to Antonio Barrera Arenales, a renowned pediatric dermatologist in Colombia. The author of the letter, Juan Guillermo Chalela Mantilla, recalls the friendship and professional collaboration they had over the years. He highlights Barrera Arenales' contribution to the field of pediatric dermatology, as well as his sense of humor and ability to bring joy to others. The letter expresses surprise and sadness over Barrera Arenales' decision to leave without apparent reason, leaving a void in the medical community and among his friends. [Extracted from the article]