“Clostridioides Difficile Infection Following Procalcitonin-Guided Antibiotic Therapy for COVID-19”. Acta Medica Philippina 57, no. 7 (July 27, 2023). Accessed April 25, 2025. https://actamedicaphilippina.upm.edu.ph/index.php/acta/article/view/5443.