Authors

Nadya Naydenova

UMHAT "St Ekaterina", Sofia, Bulgaria

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Maria Nedevska            

UMHAT Sveta Ekaterina, Sofia, Bulgaria

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Kiparisiya Nenova - Karakasheva    

National Heart Hospital, Sofia, Bulgaria

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fedya nikolov

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Fedia Nikolov

Head of I Department of internaldiseases, Plovdiv,
UMHAT Sveti Georgi, Plovdiv, Bulgaria

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Plamen Panayotov    

MBAL Sveta Marina, Varna, Bulgaria
Medical University in Varna, Varna, Bulgaria

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