function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ballen, Gustavo A. & Mojica, José Iván', 2],
    ['Ballen, Gustavo A. & Pastana, Murilo N. L. & Peixoto, Luiz A. W.', 1],
    ['Ballen, Gustavo A. & Urbano-Bonilla, Alexander', 1],
    ['Batista-Silva, Valéria Flávia & Frota, Augusto', 1],
    ['Boeseman, M.', 1],
    ['Collins, Rupert A. & Duarte Ribeiro, Emanuell', 2],
    ['Eigenmann, C. H. & Eigenmann, Rosa Smith', 1],
    ['Eigenmann, C. H. & Vance, L.', 2],
    ['Fowler, Henry Weed', 1],
    ['Marajó, Leandro & Viana, Patrik F. & Ferreira, Milena', 2],
    ['Martín Salazar, F. J.', 1],
    ['Michael E. Retzer', 7],
    ['Miranda-Ribeiro, A. de', 2],
    ['Raphael Covain & Sonia Fisch-Muller', 2],
    ['Steindachner, F.', 3],
    ['Other (4)', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=33)',
    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);