function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Aliyev, Azer & Maharramova, Sheyda', 1],
    ['Broad, Gavin R.', 11],
    ['Di Giovanni, Filippo & Reshchikov, Alexey & Riedel, Matthias', 2],
    ['Fritzen, Niclas R. & Shaw, Mark R.', 2],
    ['Horstmann, K.', 1],
    ['Khalaim, Andrey I. & Kasparyan, Dmitri R.', 1],
    ['M. F & Kirtay, H. & Birol, O.', 1],
    ['Padua, Diego G. & Saeaeksjaervi, Ilari E. & Spasojevic, Tamara', 10],
    ['Riedel & Pénigot & Schwarz & Diller & Johansson & Japoshvili, G.', 2],
    ['Spasojevic, Tamara & Broad, Gavin R. & Klopfstein, Seraina', 1],
    ['Varga, O.', 5],
    ['Varga, Oleksandr', 5],
    ['Varga, Oleksandr & Reshchikov, Alexey', 4],
    ['Çoruh, S. & Özbek, H.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=47)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);