function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Anistratenko, V. V. & Furyk, Yu. I. & Anistratenko, O. Yu.', 2],
    ['Czaja, Alexander & Cardoza-Martinez, Gabriel Fernando', 5],
    ['Diana Delicado & ladimir Pešić & Peter Glöer', 2],
    ['Hershler, Robert & Liu, Hsiu-Ping & Hubbart, Niko', 3],
    ['Neubauer, Thomas A. & Harzhauser, Mathias & Kroh, Andreas', 2],
    ['Strong, Ellen E. & Garner, Jeffrey T. & Johnson, Paul D.', 2],
    ['Wesselingh, Frank & Poorten, Jan Johan ter & Kijashko, Pavel', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);