There is a new free virtual issue of the Annals of Occupational Hygiene available. It contains sixteen articles that mostly cover assessments of endotoxin exposure in different industries. Read from source:
http://johncherrie.blogspot.co.uk/2013/02/free-journal-articles-on-endotoxins.html
http://johncherrie.blogspot.co.uk/2013/02/free-journal-articles-on-endotoxins.html