This May, Colonel (Retd.) Associate Professor RNDr. et PhMr. Vladimír Měrka, CSc., celebrates his 90^th birthday.Our honouree is well known to readers of Military Medical Science Letters as, over the years, he has published many scientific papers and was the diligent author of countless studies. Due to his lifelong work and the results of pedagogical and scientific endeavour, Professor Měrka belongs among the most important personalities in the field of military medicine...