function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bächli, Gerhard & Merz, Bernhard & Haenni, Jean-Paul', 19],
    ['Kanavalova, Liliana & Kubik, Stepan & Bartak, Miroslav', 1],
    ['Meigen, Johann Wilhelm', 13],
    ['Sforzi, Alessandra & Sommaggio, Daniele', 1],
    ['Shamshev, Igor V.', 2],
    ['Shamshev, Igor V. & Ivković, Marija', 11],
    ['Xiao, Wenmin & Yang, Ding', 10],
    ['Xiao, Winmin & Yang, Ding', 7],
    ['Çiftçi, Mustafa Cemal & Hasbenli, Abdullah', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=68)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);