function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Alder, Joshua', 2],
    ['Baba, Kikutaro', 1],
    ['Cetra, Nicolás & Roche, Andrea', 1],
    ['Grandez, Alessandra & Ampuero, Andre & Barahona, Sergio P.', 2],
    ['Gutiérrez, Manuel Caballer & Ortea, Jesús & Rivero, Nelsy', 2],
    ['Kelaart, Edward Frederick', 1],
    ['Mehrotra, Rahul & A. Caballer Gutierrez, Manuel & M. Scott, Chad', 1],
    ['Miller, Michael Charles', 2],
    ['Salvador, Xavier & Fernández-Vilert, Robert & Moles, Juan', 1],
    ['Vallès, Yvonne & Valdés, Ángel & Ortea, Jesús', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=15)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);