function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Botella, Héctor & Martínez-Pérez, Carlos & Soler-Gijón, Rodrigo', 2],
    ['Burrow, Carole J.', 5],
    ['Hanke, Gavin F.', 2],
    ['Hanke, Gavin F. & Davis, Samuel P.', 3],
    ['Laan, Richard Van Der', 9],
    ['Newman, Michael J. & Burrow, Carole J. & Den Blaauwen, Jan L.', 1],
    ['Newman, Michael J. & Davidson, Robert G. & Blaauwen, Jan L. Den', 3],
    ['Valiukevičius, Juozas', 11]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=36)',
    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);