Instruct: Identify the main category of Medrxiv papers based on the titles
Query: Prevalence, incidence and risk factors for myopia among urban and rural children in southern China: protocol for a school-based cohort study
51
The categories of this paper are: education
3
The categories of this paper are: sexual
8
The categories of this paper are: epidemiology
61
The categories of this paper are: dermatology
65
The categories of this paper are: oral
39
The categories of this paper are: rheumatology
6
The categories of this paper are: and
19
The categories of this paper are: public
32
The categories of this paper are: rehabilitation
23
The categories of this paper are: gastroenterology
16
The categories of this paper are: immunology
26
The categories of this paper are: systems
21
The categories of this paper are: psychology
69
The categories of this paper are: palliative
24
The categories of this paper are: oncology
52
The categories of this paper are: nursing