Xenón: El anestésico del futuro

http://paginasdeanestesiologia.blogspot.com/2009/02/xenon-el-anestesico-del-futuro.html

Major complications of central neuraxial block:

http://bja.oxfordjournals.org/cgi/reprint/102/2/179

A Surgical Safety Checklist to Reduce Morbidity and Mortality in a Global Population

http://content.nejm.org/cgi/content/full/NEJMsa0810119