function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arzanov, Yu. G. & Martynov, V. V. & Nikulina, T. V.', 11],
    ['Borovec, Roman & Germann, Christoph', 2],
    ['Borovec, Roman & Perrin, Hélène', 1],
    ['Bukejs, Andris', 2],
    ['Christoph Germann', 16],
    ['Christoph Germann & Sofia Wyler & Marco Valerio Bernasconi', 1],
    ['Germann, Christoph & Chittaro, Yannick', 1],
    ['Germar, Ernst Friedrich', 1],
    ['Telfer, Angela C & Young, Monica R & Quinn, Jenna & Perez, Kate', 1],
    ['Webster, Reginald P. & Anderson, Robert S. & Webster, Vincent L.', 2],
    ['Yunakov, N. N. & Klass K. D.', 4],
    ['Yunakov, Nikolai & Nazarenko, Vitalij & Filimonov, Rostislav', 22]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=64)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);