Participants: Eugenia Kovatcheva, Boyan Jekov, Willian Dimitrov, Veselin Tselkov, Vladimir Yotsov, Georgi P Dimitrov, Elena Shoikova, Ivan Ivanov, Ivanka Pavlova, Irena Peteva, Krasimira Ivanova, PhD Student Natalia Palikova, Roumen Nikolov, Stoyan Denchev, Taisiya Vladimirova, Tsvetlin Yovchev, Bella Tetevenska, Georgi G. Dimitrov, Nikolay Stoyanov

Participants: Eugenia Kovatcheva, Boyan Jekov, Willian Dimitrov, Galina Panayotova, Daniela Pavlova, Elena Shoikova, Roumen Nikolov, Stefka Toleva-Stoimenova, PhD Student Oleg Konstantinov, Stoyan Denchev, PhD Student Svetlana Syarova, Alexander Kirkov, PhD Student Ilia Vukarski, Vladimir Yotsov, Georgi P Dimitrov, Iva Kostadinova, Ivan Garvanov, Zahari Galabov, Ivanka Pavlova, Katia Rasheva-Yordanova, PhD Student Kristiyan Aleksiev, Pepa Petrova, Irena Peteva, Kristina Bosakova, Iglika Getova, Hristo Tsolov, Rumyana Mancheva, Viktoria Spasova, Mariana Baneva, Krasimira Ivanova, Taisiya Vladimirova, Veselina Voynova, PhD Student Milena Koleva, Asya Barutchieva

Participants: Eugenia Kovatcheva, Boyan Jekov, Willian Dimitrov, Galina Panayotova, Daniela Pavlova, Elena Shoikova, Roumen Nikolov, Stefka Toleva-Stoimenova, PhD Student Oleg Konstantinov, Stoyan Denchev, PhD Student Svetlana Syarova, Alexander Kirkov, PhD Student Ilia Vukarski, Georgi P Dimitrov, Iva Kostadinova, Ivan Garvanov, Ivanka Pavlova, Katia Rasheva-Yordanova, PhD Student Kristiyan Aleksiev, Pepa Petrova, Irena Peteva, Iglika Getova, Veselina Voynova, PhD Student Milena Koleva, Viktoria Angelova, Ralitsa Yotova, Evgeniya Sendova, Ralitsa Nikolova, Asya Barutchieva, Taisiya Vladimirova, Krasimira Ivanova, Mariana Baneva, Viktoria Spasova, Vladimir Yotsov, Zahari Galabov, Kristina Bosakova, Hristo Tsolov, Rumyana Mancheva

Participants: Eugenia Kovatcheva, Elena Shoikova, Willian Dimitrov, Boyan Jekov, PhD Student Oleg Konstantinov, PhD Student Natalia Palikova, Roumen Nikolov, Georgi P Dimitrov, Galina Panayotova, Rumyana Mancheva, Stoyan Denchev, Ivanka Pavlova, Irena Peteva, Krasimira Ivanova, Taisiya Vladimirova, PhD Student Milena Koleva, Student Nikola Tomov

Participants: Eugenia Kovatcheva, Roumen Nikolov, Stoyan Denchev, Irena Peteva, Ivanka Pavlova, PhD Student Natalia Palikova, PhD Student Oleg Konstantinov, Krasimira Ivanova, PhD Student Ilia Vukarski, Taisiya Vladimirova, Katerina Mahmoudieva