Skubisz , M M , Tong , S , Doust , A , Mollison , J , Johns , T G , Neil , P , Robinson , M , Bhattacharya , S , Wallace , E , Krzys , N , Colin Duncan , W & Horne , A W 2018 , ' Gefitinib and Methotrexate to Treat Ectopic Pregnancies with a Pre-Treatment Serum hCG 1000–10,000 IU/L : Phase II Open Label, Single Arm Multi-Centre Trial ' , EBioMedicine , vol. 33 , pp. 276-281 . https://doi.org/10.1016/j.ebiom.2018.06.017