function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cabarroi-Hernandez, Milay & Villalobos-Arambula, Alma Rosa', 2],
    ['Ferreira, Isabel C. F. R. & Heleno, Sandrina A.', 1],
    ['Ghahari, H. & Bunalski, M.', 1],
    ['Grienke, Ulrike & Kaserer, Teresa & Pfluger, Florian', 1],
    ['Ho, C. - L. & Tan, Y. - C.', 1],
    ['Lu, Xiaoxiao & Xie, Chunqin & Wang, Yunxiao & Liu, Yongnan', 2],
    ['Luangharn, Thatsanee & Karunarathna, Samantha C.', 3],
    ['Telfer, Angela C & Young, Monica R & Quinn, Jenna & Perez, Kate', 1],
    ['Thawthong, Anan & Hapuarachchi, Kalani K. & Wen, Ting-Chi', 1],
    ['Xing, Jia-Hui & Sun, Yi-Fei & Han, Yu-Li & Cui, Bao-Kai', 2],
    ['Yang, Chengshuai & Li, Weichao & Li, Chen & Zhou, Zhihua', 1],
    ['Yang, Hong-De & Ding, Yong & Wen, Ting-Chi', 2],
    ['Zheng, Sheng & Zhu, Ning & Shi, Cheng & Zheng, Heng', 1],
    ['de la Fuente, Javier Isaac & García-Jiménez, Jesús', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);