You apparently didn't carefully read this article, 543.  Mr. Riek was busy dodging bullets and bombs while living in war ridden South Sudan, and living in refugee camps where there weren't universities let alone medical training facilities nearby.  The fact that Mr. Riek speaks four languages informs this reader  that he's highly intelligent and could probably pick up where he left off with medical training.  I sure hope he can re-enter the medical field where he's comfortable practicing a great profession.