The data on these pages are completely according to the Madmen database ( https://www.olympedia.org/editions/20)
However, in Men's Handball, Martin Ott (SUI) and Ahmad Al-Emran (KUW) are listed on the OlyMADMen site as DNS, yet the site counts both and arrives at 166 handballers.
I therefore arrive at only 5253 competitors, not 5255.
This page is part of the site "Full Olympians" by Herman De Wael. See here for a full Introduction.