Chaudhry, R., Dranitsaris, G., Mubashir, T., Bartoszko, J., & Riazi, S. (2020). A country level analysis measuring the impact of government actions, country preparedness and socioeconomic factors on COVID-19 mortality and related health outcomes. EClinicalMedicine, 0(0). https://doi.org/10.1016/j.eclinm.2020.100464

Jittrapirom, P., & Tanaksaranond, G. (2020). An exploratory survey on the perceived risk of COVID-19 and travelling [Preprint]. SocArXiv. https://doi.org/10.31235/osf.io/v3g5d

Rajkumar, R. P. (2020). Warriors, worriers, and COVID-19: An exploratory study of the catechol O-methyltransferase Val158Met polymorphism across populations [Preprint]. PsyArXiv. https://doi.org/10.31234/osf.io/xrpn8

Pisano, L., Galimi, D., & Cerniglia, L. (2020, April 13). A qualitative report on exploratory data on the possible emotional/behavioral correlates of Covid-19 lockdown in 4-10 years children in Italy. https://doi.org/10.31234/osf.io/stwbn

McGann, M., & Speelman, C. (2020). Two Kinds of Theory: What Psychology Can Learn From Einstein [Preprint]. PsyArXiv. https://doi.org/10.31234/osf.io/sp94q

To test the fit between data and more than one alternative tree, you can just do a bootstrap analysis, and map the results on a neighbour-net splits graph based on the same data.

Note that the phangorn library includes functions to transfer information between trees/tree samples and trees and networks:<br/> Schliep K, Potts AJ, Morrison DA, Grimm GW. 2017. Intertwining phylogenetic trees and networks. Methods in Ecology and Evolution (DOI:10.1111/2041-210X.12760.)[http://onlinelibrary.wiley.com/doi/10.1111/2041-210X.12760/full] – the basic functions and script templates are provided in the associated vignette.