function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ebejer, Martin J. & Gatt, Paul', 1],
    ['Evenhuis, Neal L. & O’Hara, James E. & Pape, Thomas', 2],
    ['Fabricii, Ioh. Christ.', 1],
    ['Latreille, Pierre André', 4],
    ['Letana, Socrates & Mengual, Ximo & Pape, Thomas', 2],
    ['Li, Xin-Yu & Pape, Thomas & Zhang, Dong', 10],
    ['Linnaeus, Carolus', 6],
    ['Meigen, Johann Wilhelm', 2],
    ['Meurgey, François & Ramage, Thibault', 1],
    ['Modeer, Adolph', 1],
    ['O’Hara, James E. & Cerretti, Pierfilippo & Pape, Thomas', 1],
    ['Perez-Gelabert, Daniel E.', 1],
    ['Reeves, Will K. & Adler, Peter H. & Grogan, William L.', 1],
    ['Sforzi, Alessandra & Sommaggio, Daniele', 1],
    ['Wolff, Marta & Grisales, Diana', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=40)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);