fix typo and add reference

SafetyGraphics · Feb 9, 2023 · 1e2f860 · 1e2f860
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diff --git a/DESCRIPTION b/DESCRIPTION
@@ -9,7 +9,7 @@ Authors@R: c(
 	person("Anh","Tran", role = "aut"),
 	person("Isaac","Zhao", role="aut"))
 Maintainer: Jeremy Wildfire <[email protected]>
-Description: Interactive adverse event (AE) volcano plot for monitoring clinical trial safety. This tool allows users to view the overall distribution of AEs in a clinical trial using standard (e.g. MedDRA preferred term) or custom (e.g. Gender) catergories. This tool provides a stand-along shiny application and flexible shiny modules allowing this tool to be used as a part of more robust safety monitoring framework like the Shiny app from the 'safetyGraphics' R package. 
+Description: Interactive adverse event (AE) volcano plot for monitoring clinical trial safety. This tool allows users to view the overall distribution of AEs in a clinical trial using standard (e.g. MedDRA preferred term) or custom (e.g. Gender) categories using a volcano plot similar to proposal by Zink et al. (2013) <doi:10.1177/1740774513485311>. This tool provides a stand-along shiny application and flexible shiny modules allowing this tool to be used as a part of more robust safety monitoring framework like the Shiny app from the 'safetyGraphics' R package. 
 License: MIT + file LICENSE
 Encoding: UTF-8
 LazyData: true

diff --git a/README.md b/README.md
@@ -1,6 +1,7 @@
 # volcano-plot
 
- Interactive adverse event (AE) volcano plot for monitoring clinical trial safety. This tool allows users to view the overall distribution of AEs in a clinical trial using standard (e.g. MedDRA preferred term) or custom (e.g. Gender) catergories. This tool provides a stand-along shiny application and flexible shiny modules allowing this tool to be used as a part of more robust safety monitoring framework like the Shiny app from the 'safetyGraphics' R package. 
+Interactive adverse event (AE) volcano plot for monitoring clinical trial safety. This tool allows users to view the overall distribution of AEs in a clinical trial using standard (e.g. MedDRA preferred term) or custom (e.g. Gender) categories using a volcano plot similar to proposal by [Zink et al. (2013)](https://pubmed.ncbi.nlm.nih.gov/23690094/). This tool provides a stand-along shiny application and flexible shiny modules allowing this tool to be used as a part of more robust safety monitoring framework like the Shiny app from the 'safetyGraphics' R package. 
+License: MIT + file LICENSE
 
 <img width="1429" alt="image" src="https://user-images.githubusercontent.com/3680095/172978390-a803a937-f156-4f49-b4e9-bae9bdb84d77.png">