Ralph Mösges, M.D., from the Institute of Medical Statistics, Informatics and Epidemiology in Cologne, Germany, and colleagues assessed the clinical efficacy and safety of a cumulative dose of 170 μg LPP administered subcutaneously over three weeks among 554 adults with grass pollen rhinoconjunctivitis. The participants were randomized in a 1:2 ratio to receive subcutaneous injections...