Rescue subthalamic stimulation after unsatisfactory outcome of pallidal stimulation in Parkinson's disease: a case series and review.

"Conflict of interest The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. The author(s) declared that they were an editorial board member of Frontiers, at the time of submission. This had no impact on the peer review process and the final decision."

"The author(s) declare financial support was received for the research, authorship, and/or publication of this article. This study was funded by the Shanghai Municipal Health Commission [grant Number 202140181 to DL], the Shanghai Science and Technology Commission [grant Number 22Y11903900 to DL], Ruijin Hospital Guangci Innovative Technology Launch Program [GCQH202205 to DL], and Shanghai Health and Family Planning Commission Youth Fund [grant Number 20204Y0066 to PH]."