function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bu, Yun & Potapov, Mikhail B. & Yin, Wen Ying', 5],
    ['Bu, Yun & Xiong, Yan & Luan, Yun-Xia & Yin, Wen-Ying', 1],
    ['Eusébio, Rita & Sendra, Alberto & Enghoff, Henrik', 9],
    ['Likhitrakarn, Natdanai & Nakamura, Osami & Wiroonrat, Wassana', 2],
    ['Nakamura, Osami & Likhitrakarn, Natdainai', 3],
    ['Shrubovych, Julia', 1],
    ['Tuxen, S. L.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=22)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);