Beneficial effectiveness and safety of homeopathic therapy for upper respiratory tract infection in children: a systematic review. (May 2019) - Liu, Xue-han; Lu, Chun-li; Wang, Li-qiong; Shang, Ya-xi; Stub, Trine; Kristoffersen, Agnete E.; Norheim, Arne Johan; Musial, Frauke; Alraek, Terje; Fonnebo, Vinjar; Liu, Jian-ping