Serotype 3 as a challenging phenotype in pneumococcal early-onset sepsis: case report and 25-year literature review - Abiel Homero Mascareñas De Los Santos; Melissa Esmeralda Martínez Morán; Paul Santiago Arcos Viscarra; José Iván Castillo Bejarano; Denisse Natalie Vaquera Aparicio (BMC Pediatrics, 2026)