Effects of pet exposure in the first year of life on respiratory and allergic symptoms in Italian children. The sidria-2 study.

Lombardi E, Simoni M, La Grutta S, Viegi G, Bisanti L, Chellini E, Dell'Orco V, Migliore E , Petronio MG, Pistelli R, Rusconi F, Sestini P, Forastiere F, Galassi C, and the SIDRIA-2. Collaborative Group.

Pediatr Allergy Immunol 2010; 21: 268-76.

http://www.ncbi.nlm.nih.gov/pubmed/20444167