Ok roger.
Just though we can do something for all the riders in Singapore.
Anyways for a good read you can click the link below
https://www.google.com.sg/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&ved=0CCcQFjAA&url=https%3A%2F%2Fwww.nuh.com.sg%2Fwbn%2Fslot%2Fu1753%2FPatients%2520and%2520Visitors%2FMedia%2520Articles%2FDec%252008%2F13th.pdf&ei=nYr8UpqQJIOGiQe4i4HIBQ&usg=AFQjCNG1xNOt_Lr0ycgVoQqOxjMeAMENjQ&sig2=oAPQAaADxMqDkl4-8h8UIw&bvm=bv.61190604,d.aGc