| Argentina | Argentine PTC, Buenos Aires | Gustavo Santa Cruz |
| Australia | Australian Bragg Center, Adelaide | Michael Penniment |
| Austria | MedAustron, Wiener Neustadt | Eugen Hug |
| Belgium | PARTICLE, Leuven | Tom Depuydt |
| Canada | TRIUMF, Vancouver | Cornelia Hoehr |
| China | WPTC, Zibo | Zhang Jianguang |
| SPHIC, Shanghai | Guo-Liang Jiang |
| WHITC, Wuwei | Qiang Li |
| SINAP PTC, Shanghai | Zhentang Zhao |
| Zhuozhou Proton Therapy Center, Hebei | Xianshu Gao |
| Guangzhou Concord Cancer Center, GCCC | Shen Fu |
| Hefei Ion Medical Center (HIMC), Hefei City, Anhui | Hsiao-Ming Lu |
| Shandong Proton Center, Shandong Cancer Hospital & Institute, Jinan | Jinming Yu |
| HKSH Proton Therapy Center, Hong Kong SAR | Amy Chang |
| Czech Republic | Proton Therapy Center, Prague | Jiri Kubes |
| Denmark | Danish Center for Particle Therapy (DCPT), Aarhus | Morten Hoyer |
| France | Institute Curie, Orsay | Remi Dendale |
| CAL, Nice | Marie Vidal |
| CYCLHAD F. Baclesse Regional Cancer Center, Caen | J.-L. Habrand |
| Germany | HIT, Heidelberg | Juergen Debus |
| Helmholtz-Zentrum, Berlin | Andrea Denker |
| WPE, Essen | Beate Timmermann |
| MIT, Marburg | Sebastian Adeberg |
| Universitätsklinikum Carl Gustav Carus, TU Dresden, Dresden, Dresden | Esther Troost |
| India | Apollo Hospitals, Chennai | John Chandy |
| Italy | Catania, Sicily | Giacomo Cuttone |
| CNAO, Pavia | Marco Pullia |
| APSS, Trento | Marco Cianchetti |
| IEO, Milan | Roberto Orecchia |
| Humanitas, Milan | Marta Scorsetti |
| Japan | HIMAC, QST, Chiba | Hiroshi Tsuji |
| NCC, Kashiwa | Tetsuo Akimoto |
| PMRC, Tsukuba | Takeji Sakae |
| HIBMC, Hyogo | Yusuke Demizu |
| Shizuoka Cancer Center | Shigeyuki Murayama |
| FPH-PTC, Fukui | Hiroyasu Tamamura |
| Heavy Ion Medical Center, Gunma | Tatsuya Ohno |
| Southern-Tohoku PTC, Koriyama | Masao Murakami |
| Medipolis PTRC, Ibusuki | Takashi Ogino |
| i-ROCK, Kanagawa CC, Yokohama | Shinichi Minohara |
| Hokkaido University Hospital PTC, Sapporo | Hidefumi Aoyama |
| Norway | Oslo University Hospital, Oslo | Marianne Guren |
| Haukeland University Hospital, Bergen | Einar Waldeland |
| Poland | IFJPAN, Krakow | Renata Kopec |
| Russia | ITEP, Moscow | Vladimir Khoroshkov |
| JINR, Dubna | Gennady Mytsin |
| PNPI, Saint-Petersburg | Dimitri Seliverstov |
| MIBS Dr. Berezin, Saint-Petersburg | Arkadi Stolpner |
| Saudi Arabia | Saudi Particle Therapy Center, Ryiadh | Mushabbab Al Asiri |
| Singapore | NCCS PBT, Singapore | Michael Wang |
| Proton Therapy Pte Ltd, Singapore | Djeng Shih Kien |
| South Africa | IThemba LABS, Capetown | Jaime Nieto-Camero |
| South Korea | NCC, Ilsan-gu, Seoul | Tae Hyun Kim |
| KIRAMS, Nowon-gu, Seoul | Mi-Sook Kim |
| Samsung PTC, Seoul | Heechul Park |
| Yonsei University Particle Therapy, Seoul | Jin Sung Kim |
Spain
| Quironsalud Radioterapia de Protones, Madrid | Alejandro Mazal |
| Cancer Center Clinica Universidad de Navarra, Madrid | Felipe Calvo Manuel |
Sweden
| The Skandion Clinic, Uppsala | Alexandru Dasu |
Switzerland
| PSI, Villigen | Damien Weber |
Taiwan (China)
| National Taiwan University Cancer Center, Taipei | Sung-Sin Kuo |
| Chang Gung Memorial Hospital, Linkou | Joseph Tung-Chieh Chang |
| Veterans General Hospital Heavy Ion Therapy Center, Taipei | Yu-Ming Liu |
| Medical University Hospital, Taipei | Jeng-Fong Chiou |
| China Medical Univ. Hospital (CMUH), Taichung | Clifford Chao |
| Taichung Veterans General Hospital, Taichung | Yung-Fa LU |
Thailand
| Her Royal Highness Maha Chakri Sirindhorn Proton Therapy Center, Bangkok | Chonlakiet Khorsprasert |
The Netherlands
| UMCG Proton THerapy Center, Groningen | Stefan Both |
| ZON Maastricht PTC, Maastricht | Mirko Unipan |
| HollandPTC, Delft | Mischa Hoogeman |
| UK | Center for Oncology, Clatterbridge | Linda Mortimer |
| UCLH, NHS Foundation Trust, London | Yen-Ching Chang |
| The Christie, NHS Foundation Trust, Manchester | Ed Smith |
| USA | MGH Cancer Center, Boston | Helen Shih |
| LLUMC, Loma Linda, CA | Jerry Slater |
| M.D. Anderson, Houston, TX | Steven Frank |
| USCF, Berkeley, CA | Kavita Mishra |
| FPTI, Jacksonville, FL | Nancy Mendenhall |
| Roberts PTC , UPenn, PA | James Metz |
| Hampton Univ. PT Institute, Hampton, VA | Allan Thornton |
| McLaren PT Center, Flint, Michigan | Hesham Gayar |
| California Protons, San Diego, CA | Andrew Chang |
| North Western Medicine Chicago Proton Center, Chicago, IL | Stephen Mihalcik |
| Oklahoma Proton Center, Oklahoma City, OK | John Chang |
| Fred Hutch CC Proton Therapy, Seattle, WA | Jing Zeng |
| ProCure PTC, Somerset, New Jersey, NY | Brian Chon |
| Washington University, St.Louis, MO | Stephanie Perkins |
| Mayo Clinic, Rochester, MN | Robert Foote |
| Mayo Clinic, Scottsdale, AZ | Jonathan Ashman |
| Willis-Knighton CCenter, Shreveport, LA | Lane Rosen |
| Thompson Proton Center, Knoxville, TN | Sammie G. Hedrick |
| Texas Center for Proton Therapy, Irving, TX | Andrew K. Lee |
| Maryland Proton Treatment Center, Baltimore, MD | Matthew Witek |
| University of Cincinnati Health PTC, Cincinnati, OH | Anthony Mascia |
| New York Proton Center, New York, NY | Charles B. Simone |
| Emory Proton Therapy Center, Atlanta, GA | Mark McDonald |
| Beaumont Proton Therapy Center, Detroit, MI | Rohan Deraniyagala |
| Miami Cancer Institute, Baptist Healt, Miami, FL | Minesh Mehta |
| University of Miami Sylvester PTC, Miami, FL | Michael P. Buktus |
| Johns Hopkins Proton Therapy Center, Washington, D.C. | Curtiland Deville |
| Inova Schar Cancer Institute, Fairfax, VA. | Ashish Chawla |
| The James Cancer Hospital PTC, Columbus, OH. | Arnab Chakravarti |
| Penn Medicine Virtua Proton Center, Southern New Jersey, NJ. | Graeme Williams |
| Lancaster General Hospital Proton Center, Lancaster, PA. | Pam Boimel |
| Mayo Clinic Florida Particle Therapy, Jacksonville, FL. | Chris Beltram |
| OSF Health Care Cancer Institute, Peoria, IL. | James L. McGee |
| Stanford University School of Medicine, Dep. of Radiation Oncology, Stanford, CA. | Billy W. Loo |
| University of Wisconsin-Madison, WI. | Ben Durkee |
| Lynn Cancer Institute, Boca Raton, FL. | Suresha Rana |
