1. Houston
Methodist Research Institute, 6670 Bertner Avenue, Houston, Texas 77030, United States
2. Politecnico di Torino, Corso Duca
degli Abruzzi 24, Turin 10129, Italy
3. Birck
Nanotechnology Center, Purdue University, West Lafayette, Indiana47907, United States
4. University of Houston, Department of Physics and Texas
Center for Superconductivity, Univesrity of Houston, 4800 Calhoun
Road, Houston, Texas 77004, United States