The implant vs. the injectable.
Nelson
A L
AL
D003271:Contraceptive Agents, Female / Q000191:economics*; D003692:Delayed-Action Preparations; D004343:Drug Implants; D005260:Female; D006801:Humans; D007279:Injections, Subcutaneous
D003271:Contraceptive Agents, Female; D003692:Delayed-Action Preparations; D004343:Drug Implants