While your query specifies October, this is the primary academic paper matching those specific identifiers (Paper 18, Volume 21, 2018). Other notable publications matching parts of your description from October 2018 include: :
Journal of the International AIDS Society : Volume 21, Issue 10 (October 2018) contains research on regional differences in HIV prevention. 18 – Volume 21 – October 2018
Value in Health : Volume 21, Issue 10 (October 2018), covering health economics and outcomes research. : While your query specifies October, this is the
The New Paper : The edition of the Singaporean newspaper. While your query specifies October