Correction to: Biol Res (2019) 52:4 https://doi.org/10.1186/s40659-019-0213-z

The Fig. 1b is wrongly published in the original publication of the article [1]. The correct version of Fig. 1b is presented in this Correction.

Fig. 1
figure 1

Effects of the combination of HPD and X-ray. The combination significantly suppressed the proliferation activity (a) and promoted apoptosis of A549 cells (HPD: 10 μg/mL; X-ray: 10 Gy irradiation) (b). HPD hematoporphyrin derivative, PI propidium iodide