function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Calcinai, Barbara & Belfiore, Giuseppe & Pica, Daniela', 2],
    ['Fassbender, Nico & Stefanoudis, Paris V', 3],
    ['Hall, Kathryn A. & Ekins, Merrick G. & Hooper, John N. A.', 5],
    ['Pisera, Andrzej', 1],
    ['Samaai, Toufiek & Pillay, Ruwen & Janson, Liesl', 3],
    ['Topsent, Émile', 1],
    ['Van Soest, Rob W. M.', 1],
    ['Van, Rob W. M.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=17)',
    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);