- Akhtar Farah
- Akhtar Naveed
- Akil Esref
- Akimov M.
- Akinsanya Billy
- Akiyama Junichi
- Akkaya Ersan
- Akkoca Fatma
- Akkoc Yunus
- Akkol E. K.
- Akopov Eugeny L.
- Akopov G.P.
- Akopyan Hayane
- Akoumianaki Tonia
- Akpinar Hafize Aysin
- Akram Muhammad
- Akram Muhammad
- Akrasi-Sarpong Yaw
- Aksamirska-Alm Grażyna
- Aksamirska Grażyna
- Aksamirski M.
- Aksamit Dariusz
- Aksoy S.
- Aktas Dilek
- Aktas Munir
- Aktas Orhan
- Akthar S.
- Aktümsek Abdurahman
- Aktumsek Abdurrahman
- Akune Toru
- Akunne H. C.
- Akutko K.
- Akyil Fatma T.
- Al Jboor Mays
- Al Khawaja I.
- Al Naal M.
- Alabbas Ali
- Al-Abd Ahmed M.
- Alabi Tolulope Oyetunde
- Aladjem Mirit I.
- Al-Ahmad Mona
- Al-Akra Lina
- Alakurtti Kirsi
- Alakurtti Sami
- Alam Catharina
- Alami Negar N.
- Alami N.N.
- Alam Lilja Piuli
- Alam Parvez
- Alamri Faisal F.
- Alam Shumyle
- Alanazi A. D.
- Alanen Kalle
- Alaoui-Jamali Moulay A.
- Alarcón-Zapata Barbara
- Alarcón-Zapata Pedro
- Alaref Adnad F.
- Alas Alexandriah Nicole
- Alathiaki A. S.
- Al-Attrach I.
- Alavian Seyed M.
- Al-Ayed Abdullah S.
- Al-Bari M. Abdul Alim
- Al Bdour Muawyah
- Albert I.
- Alberti G.
- Albert Ina
- von Albertini Beat
- Albertini Marco
- Alberti Simon
- Albert L.
- Albert Michael
- Albert Michael H.
- Albert Michael H.
- Albini Adriana
- Albiniak Anna
- Albiniak J.
- Albiniak Jarosław
- Albiniak Magdalena
- Albiniak Michał
- Albińska Ewa
- Albizem Moetaz
- Albrecht Jan
- Albrecht Łukasz
- Albrecht Piotr
- Albright Charlie F.
- Albrizio Stefania
- Alcázar Andrés
- Alcazar J.
- Alcazar Juan L.
- Alcocer-Gómez Elísabet
- Aldarweesh Ahmed
- Aldecoa Cesar
- Aldinc Emre
- Al-Doori Z.
- Aldwin M.
- Al-Ebraheem Alia
- AleCardio Investigators [m. in.] for the
- Alefelder M.
- Alegret Monserrat
- Aleid Abdulaziz
- Aleid Fatoon
- Aleinikova O.
- Aleinikova Olga V.
- Alejo Maria
- Aleksander Sławińsk I
- Aleksandra S.
- Aleksandra Skiba
- Aleksandrovich Aleksander
- Aleksandrowicz Jakub
- Aleksandrowicz Paweł
- Aleksandrowicz R.
- Aleksandrowicz Z.
- Aleksandrowicz Zuzanna
- Alekseeva E.
- Alekseeva Lyudmila
- Alekseev Andrey
- Aleksejūnienė J.
- Aleksejuniene Jolanta
- Alekseyev Nikolay I.
- Aleksiejew-Kleszczyński Tomasz
- Alemany Laia
- Aleshin Vasily A.
- Alessandra Mancini
- Alessandri C.
- Alessandri Claudia
- Alessandri Cristiano
- Alessandro M.
- Aleszewicz-Baranowska Janina
- Aletańska-Kozak Monika
- Alexander Denise
- Alexander John
- Alexandri Nektaria
- Alexandrova Elena
- Alexandrov Anne W.
- Alexeeva Ekaterina
- Alexeevich Konovalov Dmitryi
- Alexiev Filip
- Alex Jogymol Kalariparampil
- Alexsandrova Olga A.
- Alfaras Irene
- Alfaro Rodrigo J
- Alfeeva L.
- Alfonso Caldas Alberto
- Alford Mac H.
- Algeri Mattia
- Algeri Sergio
- Alghamdi Ali J.
- Al-Gharaibeh Abeer
- Algul Hana
- Alhadi Ahmed
- Alhadi Mohammed
- Alharby Hassan
- Al‑Hasan Majdi N.
- Al Hashmi Amal M.
- Al-Hayouti Abdulsalam
- Alhazmi Riyadh A.
- Alhazzani Adel
- Alhejji Fatmah
- Al-Hendy Ayman
- Alhimaidi Ahmad R.
- Alhusaini Saud
- Al-Hussaini Maysa
- Ali Khan Muhammad Farhan
- Ali Shah Syed Zahid
- Ali Ahmed
- Ali A.M.
- Ali Anser
- Alibrandi Angela
- Alicino Cristiano
- Aliev Gjumrakch
- Aligiannis N.
- Aligiannis Nektarios
- Ali Hayssam M.
- Ali Iftikhar
- Alilou Mostafa
- Ali Mohamed
- Ali Muhammad
- Alinezhad Saeid
- Alinowska-Łyszczarz Alicja
- Alio Jorge L.
- Alipieva K.
- Alipieva Kalina
- Aliwaini Saeb
- Alizadeh Javad
- Aljabali Piotr
- Aljabari Reem
- Aljamea Zahra
- Aljarba Tariq M.
- Aljasim Leyla A.
- Al-Jassar Waleed Fahad
- Aljboor Mays
- Al-Jehani Hosam
- Alkader Mustafa
- Alkahtani Mohammed A.
- Alkahtani Saad
- Al-Kawas Firas
- Alkhaibari A. M.
- Alkiewicz J.
- Alkiewicz Jerzy
- Allaire C.M.
- Allaire E.
- Allambergenova Zoya
- Allan Matthew
- Allanore Y.
- Allanore Yannick
- Allard Joanne
- Allegri Landino
- Allen David
- Allende Daniela S.
- Allen Faith
- Allen Krisandra
- Allen Sarah
- Allert Sixtus
- Allescher Julia
- Alligiannis N.
- Allikments Kristina
- Allikmets R.
- Allingham R. Rand
- Allin M.P.
- Allocco D.J.
- Allouch Hassan
- Allsup David
- Allum William
- Almacellas Eugènia
- Alma Manna
- Almasan Alexandru
- Almazo Isabel M.
- Almeida Agostinho
- Almeida Danilo Candido De
- Almeland Stian Kreken
- Al-Mosawi Lamis Karolina
- Almyroudi Maria-Panagiota
- Al-Nawaiseh Ibrahim
- Alnawaiseh Ibrahim
- Al-Nesf Maryam Ali
- Al-Obeidan Saleh A.
- Aloe L.
- Alomari Mohammed M.M.
- Alonso Alicia
- Alonso Estella M.
- Alonso Guillermo D.
- Alonso M. Henar
- Alonso Sonsoles
- Alperth F.
- Alperth Fabian
- Alpert N.
- Alpysbayeva Saltanat I.
- Alqahtani Yahya S.
- Alqarni Ali O.
- Alraqi S.
- Alrifai Mosa