The Karma system is currently undergoing maintenance (Monday, January 29, 2018).
The maintenance period has been extended to 8PM EST.

Karma Credits will not be available for redeeming during maintenance.

Journal of Medical Internet Research

E-collection 'CATCH-IT Report'

An evidence-based critical appraisal of a paper published in another journal. Could be used to point out key papers in other journals, or to discuss methodological flaws. See separate guidelines on how to write a CATCH-IT paper.Will usually be forwarded to the original author for a rebuttal.