[email protected]. +7 499 703 22 59 +380 44 392 14 23 +375 29 594 88 88 (Viber, WhatsApp) +7 727 350 50 02. OHI-S in HONG KONG: Registration no 3188308. SUITE C, LEVEL 7, WORLD TRUST TOWER, 50 STANLEY STREET, OHI-S in Europe: OHI-S medical technology OÜ. 10117 Estonia, Tallinn, Tartu mnt, house 18, office 55.