Letters to the Editor about a recent journal article are referring to a recent article in this journal must be received within three months of its publication. For example, a letter referring to an article published in the January issue must be submitted online no later than March 31st. Letters submitted after the allowed time will not be considered.

A maximum of three authors and 10 references are allowed. Neither tables nor figures are allowed.

Letters to the Editor NOT referring to a recent journal article will be prepared for this purpose: Original research that is of interest but does not fulfill all the requirements needed for publication as a full-length manuscript can be submitted as a letter to the editor. The letter must have a title and a maximum of three authors.

No more than 10 references and either one table or one figure are allowed.

Limits:

Letters maximum number of references is 10, maximum Number of illustrations/Tables is 1.