1. Department of Paediatric, Fuyang Cancer Hospital, Fuyang, Anhui, China
2. Department of Cardiology, Hefei Second People’s Hospital Affiliated to Bengbu Medical College, Hefei, Anhui, China
3. Department of Respiratory, Hefei Second People’s Hospital Affiliated to Bengbu Medical College, Hefei, Anhui, China
4. Department of Respiratory, Fuyang Women and Children ‘s Hospital, Fuyang, Anhui, China.