function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Duwal, Ram Keshari & Jung, Sunghoon & Yasunaga, Tomohide', 1],
    ['Ghahari, Hassan & Chérot, Frédéric', 8],
    ['Konstantinov, Fedor V.', 1],
    ['Konstantinov, Fedor V. & Luo, Zhaohui & Vinokurov, Nikolay N.', 1],
    ['Konstantinov, Fedor V. & Namyatova, Anna A.', 2],
    ['Konstantinov, Fedor V. & Vinokurov, Nikolay N.', 2],
    ['Li, Xiao-Ming & Liu, Guo-Qing', 13],
    ['Linnavuori, Rauno E.', 6],
    ['Norbiato, Margherita & Dioli, Paride & Cianferoni, Fabio', 1],
    ['Vinokurov, Nikolai N. & Luo, Zhaohui', 1],
    ['Çerçi, Barış & Koçak, Özgür & Tezcan, Serdar', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=37)',
    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);