Talu, Ave, Kristiina Rajaleid, Katri Abel-Ollo, Kristi Rüütel, Mati Rahu, Tim Rhodes, Lucy Platt, Natalia Bobrova, and Anneli Uusküla. "HIV infection and risk behaviour of primary fentanyl and amphetamine injectors in Tallinn, Estonia: implications for intervention." The International journal on drug policy 21, no. 1 (2010): 56-63.