I. Original Research

a. Basic Sciences 

• Animal and cell studies, usually conducted in the laboratory environment 
• Studies on bio-material and drug features 
• Research on analytical measurement, imaging, biometrics, and test development/evaluation 
• Epidemiological studies that do not use direct patient findings, patient/patient's disease data  

b. Clinical Studies 

• Epidemiological studies on the patient, patient findings, or disease 
• Observational drug studies 
• Studies requiring intervention where medical methods are tested 
• Medical device studies 
• Non-intrusive, therapeutic studies 
• Prognostic studies  

II. Reviews

• Review studies that summarize the existing literature addressing a specific research question
•  Literature (Narrative) reviews, Systematic Reviews or Meta-Analyses 

III. Case Presentation / Analysis 

• Case reports or Case Series, including 
• Clinical scenarios or cases worth broad educational value 
• Rare diseases or unusual presentations of common diseases