Claim: Since 1993, Estonia has participated at the World Athletics Championships, (ranking 50th in overall medal) and the Estonian participant who received the most medals is Gerd Kanter, (who got one gold, two silvers, and two bronze), while the  Estonian participant that received the least medal is Erki Nool, (who got a silver medal).
Evidence: 50 Erki Nool Silver Maicel Uibo Silver