1Lieberman D, Schlaeffer F, Boldur I, et al. Multiple pathogens in adult patients admitted with community - acquired pneumonia: a one year prospective study of 346 consecutive patients. Thorax , 1996;51:179--184.
2George A. Sarosi. Atypical pnetmaonia: Why this term may be better left unsaid. Postgraduate medicine, 1999; 105:250--251.
3Seto WH, Tsang D, Yung RWH, et al. Haemorrhagic - fever- like changes andnormal chest radiograph in a doctor with SARS. Lancet,2003; 361 : 1520--1521.
4Moira CY, Yu WC. Outbreak of severe acute respiratory syndrome in Hong Kong Special Administrative Region: case report. BMJ,2003; 326:850-852.