function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bezděk, Aleš & Hájek, Jiří', 10],
    ['Chamorro, William & Marin-Armijos, Diego & senjo, Angelico', 9],
    ['Cárdenas-Bautista, Johann Stephens', 2],
    ['Edmonds, W. D.', 3],
    ['Edmonds, W. D. & Zídek, J.', 4],
    ['Freese, Edwin L. & Veal, Doug A. & Lago, Paul K.', 2],
    ['Hielkema, Auke J. & Hielkema, Meindert A.', 7],
    ['Kohlmann, Bert & Arriaga-Jimenez, Alfonsina & Roes, Matthias', 5],
    ['Lizardo, Viridiana & Moctezuma, Víctor', 73],
    ['Maldaner, Maria E. & Cupello, Mario & Ferreira, Daniela C.', 8],
    ['Moctezuma, Victor & Halffter, Gonzalo', 20],
    ['Moctezuma, Victor & Halffter, Gonzalo & Lizardo, Viridiana', 13],
    ['Moctezuma, Victor & Sanchez-Huerta, Jose Luis', 3],
    ['Pérez-Hernández, Cisteil Xinum', 2],
    ['Solís, Ángel & Kohlmann, Bert', 2],
    ['Other (4)', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=167)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);