Authors

Anna Popova

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Arman Postadzhiyan

UMHAT SVETA ANNA, Sofia, Bulgaria

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Dimitar Raev

UMHAT SVETA ANNA, Sofia, Bulgaria

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Konstantin Ramshev            

Military Medical Academy, Sofia, Bulgaria

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Ralitsa Raycheva                

MU Plovdiv, Plovdiv, Bulgaria

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Nizar Rifai

UMBAL ISUL, Sofia, Bulgaria

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Nikolay Runev        

UMHAT Alexandrovska, Sofia, Bulgaria

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