function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chen, Zhi-Teng', 11],
    ['Huo, Qing-Bo & Du, Yu-Zhou', 2],
    ['Li, Weihai & Murányi, Dávid', 1],
    ['Maruyama, Hiroki', 1],
    ['Mo, Raorao & Liu, Ruijun & Wang, Guoquan & Li, Weihai', 4],
    ['Sivec, Ignac', 1],
    ['Stark, Bill P. & Sivec, Ignac', 14]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=34)',
    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);