IGHE and asthma: Analysis of IgE to the dog allergen molecules Can f 1, Can f 2, Can f 4 and Can f 6, belonging to the lipocalin family, to Can f 3, the dog serum albumin, and to Can f 5, the prostatic kallikrein, offers improved opportunities to shed light on associations between asthma and allergic sensitization at the molecular allergen level.6