Proportion of adult community-acquired pneumonia cases attributable to Streptococcus pneumoniae among Hajj pilgrims in 2016 oleh Ali AlBarrak, Badriah Alotaibi, Yara Yassin, Abdulaziz Mushi, Fuad Maashi, Yassein Seedahmed, Mohamed Alshaer, Abdulaziz Altaweel, Husameddin Elshiekh, Abdulhafiz Turkistani, Tanaz Petigara, John Grabenstein, Saber Yezli