function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Barrales-Alcalá, Diego', 9],
    ['De Armas, Luis F.', 1],
    ['Franganillo Balboa, P.', 1],
    ['Hirst, Stanley', 1],
    ['Lazell, James', 1],
    ['Lönnberg, E.', 1],
    ['Pocock, Reginald Innes', 2],
    ['Roewer, Carl Friedrich', 1],
    ['Teruel, Rolando', 1],
    ['Valerio, C. E.', 1],
    ['Villarreal M., Osvaldo & Giupponi, Alessandro Ponce De Leão', 1],
    ['Viquez, Carlos & De Armas, Luis F.', 1],
    ['Viquez, Carlos & De, Luis F.', 1],
    ['Werner, F.', 1],
    ['de Mello-Leitão, Cândido Firmino', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=25)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);