The word "Comorbidity" is misspelled in the article title. The correct title is: Describing and Quantifying Asthma Comorbidity: A Population Study.
The correct citation is: Gershon AS, Guan J, Wang C, Victor JC, To T (2012) Describing and Quantifying Asthma Comorbidity: A Population Study. PLoS ONE 7(5): e34967. doi:10.1371/journal.pone.0034967
Footnotes
Competing Interests: No competing interests declared.