function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cao, Yanghui & Dmitriev, Dmitry A. & Dietrich, Christopher H.', 7],
    ['Guglielmino, Adalgisa & Poggi, Francesco & Bückle, Christoph', 1],
    ['Han, Chang & Yan, Bin & Yu, Xiaofei & Yang, Maofa', 4],
    ['Jiang, Jia & Luo, Gui-Mei & Song, Yue-Hua', 4],
    ['Mozaffarian, Fariba', 1],
    ['Mozaffarian, Fariba & Wilson, Michael R.', 4],
    ['Oh, Sumin & Choe, Kwang-Ryul & Jung, Sunghoon', 3],
    ['Pu, Tianyi & Wang, Jiuqiu & Song, Yuehua', 2],
    ['Song, Yue-Hua & Li, Zi-Zhong', 19],
    ['Th, Zoi N. & Lekkou, D. & Koutsogi, Terini & St, D. & Voulg, N.', 1],
    ['Valeria Trivellone & Eva Knop & Tabea Turrini & Line Andrey', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=47)',
    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);