[ProtectOurFreedom]

Thanks for the referral to the Mayo Clinic article. Here it is...

Volume 3, Issue 2P200-214
June 2019

The Many Faces of Cobalamin (Vitamin B12) Deficiency

Autors:
Bruce H.R. Wolffenbuttel, MD, PhD
Hanneke J.C.M. Wouters, BSc
M. Rebecca Heiner-Fokkema, PhD
Melanie M. van der Klauw, MD, PhD

[RummyChick]

That is it. I found it very informative.