function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Alipanah, Helen', 2],
    ['Budashkin, Yuriy & Richter, Ignác', 4],
    ['Byun, Bong-Kyu & Li, Cheng-De', 8],
    ['Mutanen, Marko & Aarvik, Leif & Huemer, Peter & Kaila, Lauri', 4],
    ['Pathania, Prakash C. & Das, Apurva & Chandra, Kailash', 2],
    ['Sun, Yinghui & Li, Houhun', 4],
    ['Weidlich, Michael', 1],
    ['Wojtusiak, Janusz & Razowski, Józef', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=26)',
    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);