function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Albornoz-Garzón, Juan G. & Conde-Saldaña, Cristhian C.', 2],
    ['Ardila Rodríguez, C. A.', 1],
    ['Ardila, Carlos', 6],
    ['Ballen, Gustavo A.', 3],
    ['Ballen, Gustavo A. & Urbano-Bonilla, Alexander', 2],
    ['Boulenger, George Albert', 1],
    ['Cope, Edward Drinker', 1],
    ['Eigenmann, C. H.', 1],
    ['Fernández-Yépez, A.', 1],
    ['Fernández-Yépez, A. & Martín Salazar, F. J.', 1],
    ['Fowler, Henry Weed', 5],
    ['Francisco Provenzano & Nadia Milani', 4],
    ['Lujan, Nathan K. & Meza-Vargas, Vanessa', 2],
    ['Regan, C. T.', 4],
    ['Steindachner, F.', 3],
    ['Other (12)', 12]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=49)',
    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);