Classification of free-text responses, in response to the question “Were there any additional reasons that caused you to not deposit these articles as preprints?”.

Categories are ordered alphabetically (except for “Other”). Percentages for corresponding and co-authorships refer to the proportion of all responses containing the relevant category; responses could contain multiple categories (N = 180 comments on corresponding authorships, 137 comments on co-authorships).分类按字母顺序排列（"其他"类别除外）。通讯作者与合著作者相关占比，均指包含对应类别的全部回复的占比；单条回复可同时包含多个分类（通讯作者相关评论样本量N=180，合著作者相关评论样本量N=137）。