Instruct: Identify the main category of Medrxiv papers based on the titles
Query: Brain age as a surrogate marker for information processing speed in multiple sclerosis
67
The categories of this paper are: transplantation
39
The categories of this paper are: rheumatology
57
The categories of this paper are: primary
31
The categories of this paper are: imaging
54
The categories of this paper are: gynecology
17
The categories of this paper are: informatics
73
The categories of this paper are: toxicology
58
The categories of this paper are: hematology
5
The categories of this paper are: health
1
The categories of this paper are: sports
9
The categories of this paper are: diseases
6
The categories of this paper are: and
3
The categories of this paper are: sexual
33
The categories of this paper are: physical
24
The categories of this paper are: oncology
70
The categories of this paper are: otolaryngology