function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Altuna, Álvaro', 1],
    ['Calder, Dale R.', 1],
    ['Campos, Felipe Ferreira & Marques, Antonio Carlos', 1],
    ['Campos, Felipe Ferreira & Pérez, Carlos Daniel & Puce, Stefania', 6],
    ['Galea, Horia R.', 1],
    ['Galea, Horia R. & Maggioni, Davide & Galli, Paolo', 12],
    ['Galea, Horia R. & Schuchert, Peter', 1],
    ['Gil, Marta & Ramil, Fran', 1],
    ['Gil, Marta & Ramil, Fran & Agís, José Ansín', 1],
    ['Gu, Zhangjie & Ruthensteiner, Bernhard & Moura, Carlos J.', 12],
    ['OLIVEIRA, OTTO M. P. & MIRANDA, THAÍS P. & ARAUJO, ENILMA M.', 8],
    ['Peña Cantero, Álvaro L.', 6],
    ['Peña Cantero, Álvaro L. & Horton, Tammy', 1],
    ['Peña Cantero, Álvaro L. & Marques, Antonio C.', 1],
    ['Watson, Jeanette E.', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=56)',
    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);