function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['BOCAK, L. & MATSUDA, K.', 2],
    ['Du, Ruolan & Yang, Yuxia & Yang, Xingke & Liu, Haoyu', 6],
    ['Kazantsev, Sergey V.', 1],
    ['Li, Yun & Bocak, Ladislav & Pang, Hong', 17],
    ['Liu, Hao Yu & Du, Ruo Lan & Zhao, Wei & Yang, Xing Ke', 8],
    ['Tshernyshev, Sergei E.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=35)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);