Bulgaria: sexually transmitted diseases.
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D002031:Bulgaria; D019049:Developed Countries; D004194:Disease; D005060:Europe; D005061:Europe, Eastern; D006302:Health Services Research; D007239:Infections; D007390:International Agencies; D009934:Organization and Administration; D009938:Organizations; D010865:Pilot Projects; D015397:Program Evaluation; D012106:Research; D012749:Sexually Transmitted Diseases; D013587:Syphilis; D013812:Therapeutics; D014480:United Nations; D014944:World Health Organization