Fix broken link and include new survey publication

PNAS helpfully broke the link to the special feature when they redesigned their site, so instead we can point to the article describing the special feature.

Author: capnrefsmmat

content/covid19/ctis.md

@@ -47,7 +47,7 @@ The [Symptom Data Challenge](https://www.symptomchallenge.org/) challenged parti
 
 ### Publications
 
-Our primary description of the survey and its results over the first year of operation was published as part of the [special feature "Beyond Cases and Deaths: The Benefits of Auxiliary Data Streams in Tracking the COVID-19 Pandemic"](https://www.pnas.org/cc/beyond-cases-and-deaths) in *PNAS*:
+Our primary description of the survey and its results over the first year of operation was published as part of the [special feature "Beyond Cases and Deaths: The Benefits of Auxiliary Data Streams in Tracking the COVID-19 Pandemic"](https://www.pnas.org/doi/full/10.1073/pnas.2111456118) in *PNAS*:
 
 - J. Salomon, A. Reinhart, A. Bilinski, E. J. Chua, W. La Motte-Kerr, M. M.
   Rönn, M. B. Reitsma, K. A. Morris, S. LaRocca, T. H. Farag, F. Kreuter, R.
@@ -57,8 +57,9 @@ Our primary description of the survey and its results over the first year of ope
   vaccination](https://doi.org/10.1073/pnas.2111454118). *Proceedings of the
   National Academy of Sciences* 118 (51) e2111454118.
 
-Other peer-reviewed publications using the survey data include:
+Other research publications using the survey data include:
 
+- A. Pilehvari, J. Ton, M. R. Mohan, A. Marathe, and A. Vullikanti (2022). [Drivers and Predictors of COVID-19 Vaccine Hesitancy in Virginia](https://doi.org/10.1007/978-3-030-96188-6_8). In: Yang, Z., von Briesen, E. (eds), *Proceedings of the 2021 Conference of The Computational Social Science Society of the Americas*. CSSSA 2021.
 - L. S. Flor, J. Friedman, C. N. Spencer, et al. (2022). [Quantifying the effects of the COVID-19 pandemic on gender equality on health, social, and economic indicators: a comprehensive review of data from March, 2020, to September, 2021](https://doi.org/10.1016/S0140-6736(22)00008-3). *The Lancet*.
 - D. P. Do and R. Frank (2022). [Prior COVID-19 infection: an underappreciated factor in vaccine hesitancy in the USA](https://doi.org/10.1093/pubmed/fdab404). *Journal of Public Health*, fdab404.
 - W. C. King, M. Rubinstein, A. Reinhart, and R. J. Mejia (2021). [Time trends, factors associated with, and reasons for COVID-19 vaccine hesitancy: A massive online survey of US adults from January-May 2021](https://doi.org/10.1371/journal.pone.0260731). *PLoS ONE* 16 (12), e0260731.