Welcome to FlyerTalk!
One thing you will find out - this is such a large and active community it is likely questions have been answered before, so learning how to use Search will advance your cause significantly. This thread:
Using the Search Feature on FlyerTalk: The Definitive Thread is a huge tool.
I'd also suggest you can find the proper answer (from medically qualified sources) by using the links in this post <
link>.
I hope your time on FlyerTalk will be as enjoyable and rewarding as mine has been.