1727-897X

1727-897X

S1727-897X2021000500807

Cuba

Cuba

00 10 2021

00 10 2021

19 5 807 813

1

World Health Organization. 2020

2

2020 395 10223 10223

507-13

3

2021 53 2 2

4

2020 395 10223 10223

497-506

5

Secretaría de Trabajo y Seguridad Social 2020

6

2020

7

2020 45 4 4

8

2020 323

1488-94

9

2020 382

1708-2015

10

2020 20 2 2

180-5

11

2020 52 6 6

369-72