Which nation's astronomers collaborated with 2020 Nobel Physics Nobel Laureate?

Indian astronomers have collaborated with the 2020 Physics Nobel Laureate Prof. Andrea Ghez for the design of back-end instruments and possible science prospects of the Thirty Meter Telescope (TMT) project. The Thirty Meter Telescope (TMT) is a proposed extremely large telescope (ELT) which is planned to be installed at Maunakea on the island of Hawaii.