function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Fang, Yan & Yan, Yijie & Jin, Zhenyu', 1],
    ['Fu, Yuting & Jin, Zhenyu & Wu, Gang', 1],
    ['Jin, Zhenyu & Qin, Zhao & Ślipiński, Adam', 10],
    ['Jin, Zhenyu & Xie, Guanglin & Yang, Qixin', 1],
    ['Jin, Zhenyu & Ślipiński, Adam & Pang, Hong', 11],
    ['Latreille, Pierre André', 1],
    ['Li, Fengming & Ślipiński, Adam & Jin, Zhenyu', 1],
    ['Terzani, Fabio & Ceccolini, Filippo & Hájek, Jiří', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=27)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);