TY - JOUR A1 - Parr, N.J. A1 - Siedlecky, S. T1 - Use of ‘dual protection’ and other combinations of contraceptive methods in Australia Y1 - 2007 DO - 10.1111/j.1753-6405.2007.00145.x JF - Australian and New Zealand Journal of Public Health VL - 31 IS - 6 SP - 567 EP - -570 ER -