we compared risk factors , clinical presentation , and progression of patients
We compared individual - level data from patients
To provide insights into the pathogenesis of H7N9 virus infection , we compared risk factors , clinical presentation , and progression of patients hospitalized with H7N9 , H5N1 , and 2009 pandemic H1N1 ( pH1N1 ) virus infections .
We compared individual - level data from patients hospitalized with infection by H7N9 ( n = 123 ) , H5N1 ( n = 119 ; 43 China , 76 Vietnam ) , and pH1N1 ( n = 3486 ) viruses .