Wittkopp, Sharine
Staimer, Norbert
Tjoa, Thomas
Stinchcombe, Timothy
Daher, Nancy
Schauer, James J
Shafer, Martin M
Sioutas, Constantinos
Gillen, Daniel L
Delfino, Ralph J
Article History
Received: 22 February 2014
Revised: 8 October 2014
Accepted: 14 October 2014
First Online: 7 January 2015
Competing interests
: CS receives royalties from SKC for the air sampling device (Sioutas Personal Cascade Impactor Sampler) used in this research.