The Doctoral Thesis will be defended on the 3 rd of November, 2014 at 15.00 at an open meeting of Promotion Council of Medicine of Rīga Stradiņš University at the Hippocrates Lecture Theatre, in 16 Dzirciema Street, Riga.The Doctoral Thesis is available at the library Rīga Stradiņš University and homepage: www.rsu.lvThe Doctoral Thesis was supported by the ESF co-financed project "Support to doctoral students for obtaining the study program and acquiring the scientific degree at