function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Guise, Jane E.', 1],
    ['Ha, Tran Manh & Tsukagoshi, Akira', 3],
    ['Kempf, Eugen Karl', 1],
    ['Luz, Nathália Carvalho Da & Coimbra, João Carlos', 1],
    ['Meisch, Claude & Smith, Robin J. & Martens, Koen', 3],
    ['Nakao, Yuriko & Tsukagoshi, Akira', 1],
    ['RAUSCH, LEA & STOICA, MARIUS & LAZAREV, SERGEI', 9],
    ['Schornikov, Evgeny I.', 3],
    ['Smith, Robin James & Lee, Jimin & Chang, Cheon Young', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=24)',
    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);