Letter to the Editor of Anales de Pediatría (Barc) about the work of Salinas-Salvador et al. ¿Retrospective study on the effectiveness and safety of the shortened 5- to 7-day antibiotic regimen for acute streptococcal pharyngotonsillitis compared to the classic 10-day regimen¿ Miguel Ángel Zafra Anta; Víctor Manuel García Nieto;