Conversation so far:
When did Chrisye get sick?
In July 2005 Chrisye was admitted to Pondok Indah Hospital.
What was Chrisye's ailments?
Chrisye was admitted to Pondok Indah Hospital, complaining of breathing difficulties.
What else was wrong with Chrisye besides breathing difficulties?
After 13 days of treatment he was moved to the Mount Elizabeth Hospital in Singapore, where he was diagnosed with lung cancer.
Was Chrisye's lung cancer treatable?
Chrisye underwent the first of six rounds of chemotherapy on 2 August 2005.

Question: Where did he do that?
Self-contained rewrite: Where did Chrisye undergo the first of six rounds of chemotherapy?