Risk of death among Multiple Sclerosis patients with private subscriptions to mobile phones in Denmark. 1987–1995, followed up through 2004.

Risk of death among Multiple Sclerosis patients with private subscriptions to mobile phones in Denmark. 1987–1995, followed up through 2004.丹麦地区持有私人手机订阅服务的多发性硬化（Multiple Sclerosis）患者的死亡风险分析：研究对象入组时段为1987年至1995年，随访至2004年。