function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Baba, Kikutaro', 2],
    ['Cornelis & Kees & Swennen', 4],
    ['Delgado, Marlon & Freire, Fúlvio Aurélio de Morais', 3],
    ['Gutiérrez, Manuel Caballer & Ortea, Jesús & Rivero, Nelsy', 5],
    ['Kelaart, Edward Frederick', 3],
    ['Krug, Patrick J. & Vendetti, Jann E. & Valdés, Ángel', 30],
    ['Mariottini, Paolo & Smriglio, Carlo & Oliverio, Marco', 1],
    ['Mehrotra, Rahul & A. Caballer Gutierrez, Manuel & M. Scott, Chad', 7],
    ['Mehrotra, Rahul & Gutierrez, Manuel Caballer & Scott, Chad M.', 2],
    ['Powell, Arthur William Baden', 1],
    ['Salvador, Xavier & Fernández-Vilert, Robert & Moles, Juan', 1],
    ['Wägele, Heike & Stemmer, Kristina & Burghardt, Ingo', 2],
    ['Yonow, Nathalie', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=62)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);