function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Evenhuis, Neal L. & O’Hara, James E. & Pape, Thomas', 1],
    ['LÖWENBERG-NETO, PETER & DE CARVALHO, CLAUDIO J. B.', 3],
    ['O. H. Swezey', 1],
    ['Patitucci, Luciano Damián & Mulieri, Pablo Ricardo', 4],
    ['Pont, Adrian C.', 4],
    ['Pérez, Sandra & De Carvalho, Claudio J. B.', 4],
    ['Xian, Chunlan & Leong, Chi Man & Luo, Jiuyang & Jia, Fenglong', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=18)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);