function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bächli, Gerhard & Merz, Bernhard & Haenni, Jean-Paul', 1],
    ['Câmara, J. T. & Plant, A. R. & Rafael, J. A.', 11],
    ['Câmara, Josenir T. & Takiya, Daniela M. & Plant, Adrian R.', 9],
    ['Ivkovic, Marija & Doric, Valentina & Baranov, Viktor', 5],
    ['Ivkovic, Marija & Perovic, Marija & Grootaert, Patrick', 1],
    ['Ivković, Marija & Gračan, Romana & Horvat, Bogdan', 6],
    ['Landry, Bernard & Harper, P. P.', 1],
    ['Meigen, Johann Wilhelm', 3],
    ['Melander, Axel Leonard', 1],
    ['Plant, Adrian R.', 31],
    ['Shamshev, Igor V. & Ivković, Marija', 2],
    ['Słowińska, Iwona', 1],
    ['Takiya, Daniela Maeda & Santos, Allan Paulo Moreira', 18],
    ['Wagner, Rüdiger & Plant, Adrian & Ivković, Marija', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=92)',
    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);