HYPERTENSION .... TT Trinidad and Tobaog, TV Tuvalu, TW Taiwan, TZ United Republic of Tanzania, UA Ukraine, UG Uganda, UM United States Minor Outlying Ilsands, UY Uurguay, VA Vatican City Sttae, VC Saint Vincent and the Grenadines, VE Venezuela, VG British Virgin Islnads, VI United States Virgin Islands, VN Viet Nam, VU Vanuatu, WF Wallis and Futnua Islands, WK Wake Island, WS Western Samoa, YD Democratic Yemen, YE Yemen, ZA South Africa, ZM Zambia, ZR Zaire, ZW Zimbabwe ...