Romero-Carazas, Rafael, Antony Paul Espiritu-Martinez, Enzo Renatto Bazualdo-Fiorini, and David Hugo Bernedo-Moreira. “Chapter 4. Observational Studies, Descriptive Studies, Cohorts, and Case-Control Studies”. In Evidence-Based Biomedicine: Methodology for Research, Standardization, and Scientific Procedural Aspects, edited by Rafael Romero-Carazas, Antony Paul Espiritu-Martinez, Enzo Renatto Bazualdo-Fiorini, and David Hugo Bernedo-Moreira, 20–25. AG Editor, 2025. Accessed December 30, 2025. https://books.southam.pub/index.php/books/catalog/book/978-9915-704-03-6.pdf/chapter/74.