We adhere to the International Committee of Medical Journal Editors (ICMJE) recommendations for authorship, requiring that authors meet all of the following criteria: y Make substantial contributions to study conception and design, or to acquisition, analysis or interpretation of data for the work y Draft the article or revise it critically for important intellectual content y Give final approval of the version to be published y Be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved Our company adheres to the authorship criteria of respected biomedical journals if their criteria differ from those of the ICMJE.