both i myself n my husband have done many researches, 亦問過more than 10 doctors, both from c+ n public, locally, usa n australia, since most of my family members are engaged as medical officers, my brother is a medical officer n professor in University of Chiago, he told me yesterday 簡單講, 係無用, just like we invest in the insurance, because the technology nowadays can only help to gather but not to utilize, and from other bk threads, can found the info below for ur refer: