Study to Assess Safety and Preliminary Activity of Eribulin Mesylate in Pediatric Participants With Relapsed/Refractory Rhabdomyosarcoma (RMS), Non-rhabdomyosarcoma Soft Tissue Sarcoma (NRSTS) and Ewing Sarcoma (EWS)

Columbia University Medical Center, New York

Children's Hospital of Pittsburgh of UPMC, Pittsburgh

Penn State Health Hershey Medical Center, Hershey

Geisinger Medical Center, Danville

Children's Hospital of Philadelphia, Philadelphia

Nemours / A.I. duPont Hospital for Children, Wilmington

Children's National Medical Center, Washington D.C.

Johns Hopkins University, Baltimore

Children's Hosptial of The King's Daughters, Norfolk

Children's Healthcare of Atlanta, Atlanta

Nemours Children's Clinic, Jacksonville

University of Alabama at Birmingham, Birmingham

Vanderbilt Ingram Cancer Center, Nashville

University of Mississippi Medical Center, Jackson

Norton Children's Hospital, Louisville

Nationwide Children's Hospital, Columbus

Children's Hospital Medical Center of Akron, Akron

Cincinnati Children's Hospital Medical Center, Cincinnati

Riley Hospital for Children - Indiana University, Indianapolis

CS Mott Children's Hospital, Ann Arbor

Blank Children's Hospital, Des Moines

Children's Hospital of Wisconsin, Milwaukee

Children's Hospitals and Clinics of Minnesota, Minneapolis

University of Minnesota, Minneapolis

Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago

Children's Mercy Hospital and Clinics, Kansas City

Children's Medical Center, Dallas

Cook Children's Medical Center, Fort Worth

Methodist Children's Hospital of South Texas, San Antonio

Phoenix Children's Hospital, Phoenix

Children's Hospital Los Angeles, Los Angeles

Southern California Permanente Medical Group, Los Angeles

Rady Children's Hospital- San Diego, San Diego

Loma Linda University Cancer Center, Loma Linda

Children's Hospital of Orange County, Orange

Randall Children's Hospital at Legacy Emanuel, Portland

Seattle Children's, Seattle

Providence Sacred Heart Medical Center and Children's Hospital, Spokane

Connecticut Children's Medical Center, Hartford

Hackensack University Medical Center, Hackensack

Rutgers cancer Institute of NJ, New Brunswick