Y. Johnson

发表

R. Coetzee, A. Wehmeyer, N. Hoffman, 2019, South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde.

R. Coetzee, Y. Johnson, N. Keuler, 2022, South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde.

R. Coetzee, Y. Johnson, N. Keuler, 2022, South African family practice : official journal of the South African Academy of Family Practice/Primary Care.