Correction to: Temporal trend of research related to gun violence from 1981 to 2018 in the United States: a bibliometric analysis

Correction to: Inj Epidemiol (2020) 7:9

https://doi.org/10.1186/s40621-020-0235-6

Following publication of the original article (Chien et al. 2020), the authors identified two errors;

1. The equations were not adequately presented since they all Greek symbols disappeared in the PDF version of the article.

   The correct presentation of the equations is given below.

$$\mathrm{Log}\left({\mathrm{NP}}_{\mathrm{t}}\right)=\mathit{\alpha }\mathbf{+}\mathit{\beta }\mathbf{\times }\mathrm{t}\mathbf{+}log\left({\text{Total}}_{\mathrm{t}}\right)\mathbf{,}\text{where}\mathrm{t}\mathrm{=}\mathrm{1}\mathrm{,}\dots \mathrm{,}\mathrm{38}$$

$$\mathrm{Log}\left({\mathrm{NP}}_{\mathsf{it}}\right)=\mathrm{\alpha }+{\mathrm{\alpha }}_{\mathsf{i}\left(\mathsf{t}\right)}+{\mathrm{\beta }}_{\mathsf{1}}\times \mathsf{I}\left(\mathsf{i}=\mathsf{1}\right)+{\mathrm{\beta }}_{\mathrm{2}}\times \mathrm{I}\left(\mathrm{i}=\mathrm{2}\right)+\mathrm{f}\left(\mathrm{t}\right)+\log \left({\mathrm{\text{Total}}}_{\mathrm{it}}\right),\mathrm{\text{where}}\mathrm{i}=\mathrm{1},\mathrm{2},\mathrm{3};\mathrm{t}=\mathrm{1},\dots ,\mathrm{38}$$

• 2)The grey horizontal lines were missing in Fig. 1. The correct figure is given below.

Fig. 1.

Time trends of the number of publications and crude publication ratios by research discipline from 1981 to 2018

The original article (Chien et al. 2020) has been updated.