When searching for medical related information, keep in mind the following (PICO) questions:
To filter out bias in journal articles, an additional review process called EBM (Evidence Based Medicine) is now used to ensure the application of appropriate clinical decisions in the medical/health/nutrition fields. The Cochrane database is the source to begin your search with before searching other databases.
EBM is defined as ‘The conscientious, explicit and judicious use of current best evidence in making decisions about the care of individual patients’. (Sackett DL et al. BMJ 1996; 312: 71-2).