The authors regret that an important previous work was not referred in the original article due to our carelessness. The reference was added to the article as follows.
The sentence at the end of the third paragraph was modified as follows:
Merola et al. demonstrated 3D imaging of living diatom cells by a home-made tomographic phase microscope. [30] They successfully identified shapes and volumes of chloroplasts of the diatom cells.
Added Reference[30] F. Merola, P. Memmolo, L. Miccio, R. Savoia, M. Mugnano, A. Fontana, G. D’Ippolito, A. Sardo, A. Iolascon, A. Gambale, P. Ferraro, Tomographic flow cytometry by digital holography, Light-Sci. Appl. 6 (2017) e16241.
This correction will not affect the results and conclusions made in the original paper.
The authors would like to apologise for any inconvenience caused.