Received: 14 February 2019
Accepted: 12 July 2019
First Online: 22 July 2019
Ethics approval and consent to participate
: no ethics approval is required in this particular case since it is a systematic review presenting collective data from other prospective/retrospective observational study; all procedures described followed the normal good standard of care, and have not been used experimental/innovative treatments and/or approaches; data from patients have been presented only in a general manner, and no patient can be recognized by third parties.
: Not applicable.
: All authors declare that they have no competing interests. One of the author (FMF) is Associated Editor for BMC Infectious Diseases.