South China Journal of Preventive Medicine ›› 2022, Vol. 48 ›› Issue (7): 847-850.doi: 10.12183/j.scjpm.2022.0847

• Field Research • Previous Articles     Next Articles

  

  • Received:2021-12-30 Online:2022-07-20 Published:2022-09-06

CLC Number: 

  • R195.4