10.1364/OL.36.000834.m002 Dong Li Dong Li Wei Zheng Wei Zheng Yan Zeng Yan Zeng Yi Luo Yi Luo Jianan Y. Qu Jianan Y. Qu Media 2: Two-photon excited hemoglobin fluorescence provides contrast mechanism for label-free imaging of microvasculature <i>in vivo</i> Optica Publishing Group 2011 15 March 2011 microvasculature label-free imaging media Two-photon contrast mechanism Optics Letters vivo hemoglobin fluorescence 2011-03-15 00:00:00 Media https://opticapublishing.figshare.com/articles/media/Media_2_Two-photon_excited_hemoglobin_fluorescence_provides_contrast_mechanism_for_label-free_imaging_of_microvasculature_i_in_vivo_i_/4919009 Originally published in Optics Letters on 15 March 2011 (ol-36-6-834)