function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Buyck, Bart & Hofstetter, Valerie & Ryoo, Rhim & Ka, Kang-Hyeon', 3],
    ['Buyck, Bart & W. Henkel, Terry & Hofstetter, Valerie', 4],
    ['Herrera, Mariana & Bandala, Victor M. & Montoya, Leticia', 1],
    ['Jarvis, Charlie', 1],
    ['Karunarathna, Samantha C. & Priyashantha, K Hasith', 1],
    ['Montoya, Leticia & Herrera, Mariana & Bandala, Victor M.', 4],
    ['Petersen, Ronald H. & Hughes, Karen W.', 1],
    ['Shao, Shi-Cheng & Liu, Pei-Gui & Wei, Tie-Zheng', 2],
    ['Zambrano-Forero, Cristian J & Davila-Giraldo, Lina R', 1],
    ['Zhang, Yu-Zhuo & Liang, Zhi-Qun & Xie, Hui-Jing & Wu, Lu-Ling', 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', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);