Altered baseline brain activity in experts measured by amplitude of low frequency fluctuations (ALFF): a resting state fMRI study using expertise model of acupuncturists oleh Minghao eDong, Minghao eDong, Jun eLi, Zongquan eLiu, Xinfa eShi, Shudan eGao, Shijun eFu, Fanrong eLiang, Qiyong eGong, Guangming eShi, Jie eTian, Jie eTian